Analyzing Massive Stars
For most stars, light is the only piece of information available. By dispersing their light into a spectrum, we can learn more about the properties and the status of the stars.
A profound interpretation of the spectra for hot and massive stars is particularly challenging. The extreme conditions and the strong winds make common and handy techniques inapplicable. One example is that we use the concept of a `Local Thermodynamic Equilibrium` in their outer layers, exactly where the spectrum of a star is formed. Instead, complex numerical models are necessary to simulate the so-called ‘stellar atmosphere’ and understand the formation of the emergent spectrum.
By comparing synthetic spectra from stellar atmospheres to observations, we deduce the fundamental parameters of the highly influential class of hot stars, ranging from basic parameters such as their temperature, over their chemical composition to the strength of their wind and their ionizing flux.
Predicting Stellar Feedback
The interplay between radiation and matter is one of the fundamental processes in astrophysics. With mass-loss rates a billion times stronger than our sun, hot and massive stars dominate not only their immediate surrounding, but can influence whole clusters and drive the chemical evolution of their host galaxy.
Given their key role, the proper treatment of ionizing and mechanical feedback of hot and massive stars is of major importance on all astrophysical scales. Unfortunately, providing robust predictions has turned out to be a difficult task over the past decades and existing recipes are flawed by often being limited to narrow parameter regimes. From the interpretation of ionizing fluxes to the mass spectrum of black holes, a range of major astrophysical problems is inherently tied to the uncertainties in the underlying feedback prescriptions and stellar evolution models.
Next-generation stellar atmospheres that include hydrodynamics are a key tool in overcoming present limitations as they are able to obtain predictions and unique insights into stellar feedback at any metallicity, where currently no robust description is available.
Developing Stellar Atmospheres
As outlined above with their vital role for analyses and predictions, stellar atmospheres are a fundamental ingredient in order to interpret observations and derive fundamental insights into how stars interact with their environment. While the first model efforts go back to a time where computer code was written on punched cards, the field of developing stellar atmospheres is far from being complete. While modern computers help to decrease computation times for simple models, high-resolution spectra and multi-wavelength astronomy provide a constant demand for a more detailed treatment, increasing the computational effort.
Essentially a laboratory for astrophysics, a stellar atmosphere code must constantly be maintained, improved and extended. This does not only include additional physics and performance improvements, but also the documentation and accessibility to the user. As an active developer of PoWR, it is one of my personal aims to supply the community with a tool that is powerful, but also easy enough to handle despite all the necessary complexity when combining all the different physics and numerics. This effort will help to pave the way to properly interpret observations with next-generation telescopes and reach theoretical breakthroughs in understanding stellar winds across cosmic times.
Recent Group Publications
- Binarity at LOw Metallicity (BLOeM): Projected rotational velocities
Lennon, D. J., Berlanas, S. R., Herrero, A., Britavskiy, N., Dufton, P. L., Langer, N., Jin, H., Schootemeijer, A., Menon, A., Bestenlehner, J., Crowther, P., Vink, J. S., Bodensteiner, J., Shenar, T., Deshmukh, K., Villaseñor, J. I., Patrick, L., Najarro, F., de Koter, A., Mahy, L., Bowman, D. M., Bobrick, A., Evans, C. J., Gull, M., Holgado, G., Katabi, Z., Kubát, J., Marchant, P., Pauli, D., Pawlak, M., Renzo, M., Rocha, D. F., Sander, A. A. C., Sayada, T., Simón-Díaz, S., Stoop, M., Valli, R., Wang, C. and Xu, X.-T.
A&A 707, A204 (03/2026) - SDSS-V LVM: Resolving physical conditions in the Trifid Nebula
Sattler, Natascha, Méndez-Delgado, J. Eduardo, Kreckel, Kathryn, Morisset, Christophe, Egorov, Oleg, Egorova, Evgeniya, Nemer, Ahmad, Liang, Fu-Heng, Sander, A. A. C., Roman-Lopes, Alexandre, Román-Zúñiga, Carlos G., Johnston, Evelyn J., Sánchez, Sebastián F., Fernández-Trincado, José G., Drory, Niv, Singh, Amrita, Bizyaev, Dmitry, Sarbadhicary, Sumit K., García, Pablo, Mejía-Narváez, Alfredo and Blanc, Guillermo A.
A&A 706, A81 (02/2026) - Hydrodynamical mass-loss rates for very massive stars: I. Investigating the wind kink
Sabhahit, Gautham N., Vink, Jorick S. and Sander, Andreas A. C.
A&A 706, A97 (02/2026) - Dynamically consistent analysis of Galactic WN4b stars: Revised parameters and insights on Wolf─Rayet mass-loss treatments
Lefever, R. R., Sander, A. A. C., Bernini-Peron, M., González-Torà, G., Hamann, W.-R., Josiek, J., Ramachandran, V., Schösser, E. C. and Todt, H.
A&A 707, A8 (02/2026) - Little Red Dots as Globular Clusters in Formation
Chisholm, John, Berg, Danielle A., Boylan-Kolchin, Michael, de Graaff, Anna, Furtak, Lukas J., Kokorev, Vasily, Matthee, Jorryt, Muñoz, Julian B., Naidu, Rohan P. and Sander, Andreas A. C.
arXiv preprint (02/2026) - Ultraviolet spectroscopy reveals a hot and luminous companion to the Be star + black hole candidate MWC 656
Müller-Horn, Johanna, Ramachandran, Varsha, El-Badry, Kareem, Sander, Andreas A. C., Bodensteiner, Julia, Gies, Douglas R., Götberg, Ylva, Rivinius, Thomas, Shenar, Tomer, Schösser, Elisa C., Wang, Luqian, Bieryla, Allyson, Buchhave, Lars A. and Latham, David W.
arXiv preprint (01/2026) - Open Questions in Massive Star Research across Cosmic Scales
Sander, Andreas A. C.
arXiv preprint (01/2026) - The winds of OBA hypergiants and luminous blue variables: Dynamically-consistent atmosphere models reveal multiple wind regimes
Bernini-Peron, Matheus, Sander, Andreas A. C., Sabhahit, Gautham N., Najarro, Francisco, Ramachandran, Varsha and Vink, Jorick S.
arXiv preprint (01/2026) - EWOCS-V: Is Wd1-72 a recent post-interaction WR+O binary?
Larkin, C. J. K., Mackey, J., Jin, H., Sander, A. A. C., Reville, B., Anastasopoulou, K., Andersen, M., Bayo, A., Drake, J. J., Grebel, E. K., Guarcello, M. G., Haworth, T. J., Kalari, V. M., Lefever, R. R., Najarro, F., Ritchie, B. W. and Sabbi, E.
arXiv preprint (01/2026) - 2D unified atmosphere and wind simulations for a grid of O-type stars
Moens, N., Debnath, D., Verhamme, O., Backs, F., Van der Sijpt, C., Sundqvist, J. O. and Sander, A. A. C.
A&A 704, A121 (12/2025) - Sailing to the next safe harbour in our trip to the early Universe: The massive star population of metal-poor galaxies
Castro, N., Garcia, M., Herrero, A., Sander, A. A. C., McLeod, A. F., Roth, M. M., Negueruela, I. and Vink, J. S.
arXiv preprint (12/2025) - Discovery of a transitional type of evolved massive star with a hard ionizing flux
Sander, Andreas A. C., Lefever, Roel R., Josiek, Joris, Higgins, Erin R., Hirschi, Raphael, Oskinova, Lidia M., Pauli, Daniel, Pritzkuleit, Max, Gallagher, John S., Hamann, Wolf-Rainer, Mandel, Ilya, Ramachandran, Varsha, Shenar, Tomer, Todt, Helge and Vink, Jorick S.
NatAs, in press (12/2025) - SDSS-V LVM: Detectability of Wolf-Rayet stars and their He II ionizing flux in low-metallicity environments: I. The weak-lined, early-type WN3 stars in the SMC
González-Torà, G., Sander, A. A. C., Egorova, E., Lefever, R. R., Ramachandran, V., Egorov, O. V., Josiek, J., Schösser, E. C., Bernini-Peron, M., Kreckel, K., Wofford, A., Telford, O. G., Senchyna, P., Leitherer, C., Liang, F.-H., Blanc, G. A., Drory, N., Fernández-Trincado, J. G., Johnston, E. J., Mejía-Narváez, A. J. and Sanchez, S. F.
A&A 703, L11 (11/2025) - Mass-loading of outflows from evolving young massive clusters
Larkin, C. J. K., Hawcroft, C., Mackey, J., Lefever, R. R., Härer, L. and Sander, A. A. C.
A&A 703, L14 (11/2025) - Minimum and maximum mass-luminosity relations for stripped stars
Sabhahit, Gautham N., Vink, Jorick S., Sander, Andreas A. C. and Ramachandran, Varsha
A&A 703, A40 (11/2025) - Deciphering the gamma-ray emission in the Cygnus region
Härer, L., Vieu, T., Schulze, F., Larkin, C. J. K. and Reville, B.
A&A 703, A111 (11/2025) - Metal-poor single Wolf-Rayet stars: The interplay of optically thick winds and rotation
Boco, Lumen, Mapelli, Michela, Sander, Andreas A. C., Mesini, Sofia, Ramachandran, Varsha, Torniamenti, Stefano, Korb, Erika, Liu, Boyuan, Sabhahit, Gautham N. and Vink, Jorick S.
A&A 703, A243 (11/2025) - Low-metallicity massive single stars with rotation: III. Source of ionization and C IV emission in I Zw 18
Szécsi, Dorottya, Tramper, Frank, Kubátová, Brankica, Kehrig, Carolina, Kubát, Jiří, Krtička, Jiří, Sander, Andreas A. C. and Garcia, Miriam
A&A 703, A131 (11/2025) - Interferometry of Massive Stars: Multiplicity, Magnetism, and Stellar Winds
Bordier, H. Sana E., Deshmukh, K., Frost, A. J., Keskar, A., Lanthermann, C., Lefever, R. R., Mahy, L., Sander, A. A. C., Shenar, T. and Tramper, F.
arXiv preprint (11/2025) - Can Wolf-Rayet stars be the missing ingredient to explain high-z He II ionizing radiation?
González-Torà, G., Sander, A. A. C., Egorova, E., Egorov, O., Bernini-Peron, M., Josiek, J., Kreckel, K., Lefever, R. R., Ramachandran, V. and Schösser, E. C.
arXiv preprint (11/2025) - A high fraction of close massive binary stars at low metallicity
Sana, H., Shenar, T., Bodensteiner, J., Britavskiy, N., Langer, N., Lennon, D. J., Mahy, L., Mandel, I., de Mink, S. E., Patrick, L. R., Villaseñor, J. I., Dirickx, M., Abdul-Masih, M., Almeida, L. A., Backs, F., Berlanas, S. R., Bernini-Peron, M., Bowman, D. M., Bronner, V. A., Crowther, P. A., Deshmukh, K., Evans, C. J., Fabry, M., Gieles, M., Gilkis, A., González-Torà, G., Gräfener, G., Götberg, Y., Hawcroft, C., Hénault-Brunet, V., Herrero, A., Holgado, G., Izzard, R. G., de Koter, A., Janssens, S., Johnston, C., Josiek, J., Justham, S., Kalari, V. M., Klencki, J., Kubát, J., Kubátová, B., Lefever, R. R., van Loon, J. Th., Ludwig, B., Mackey, J., Maíz Apellániz, J., Maravelias, G., Marchant, P., Mazeh, T., Menon, A., Moe, M., Najarro, F., Oskinova, L. M., Ovadia, R., Pauli, D., Pawlak, M., Ramachandran, V., Renzo, M., Rocha, D. F., Sander, A. A. C., Schneider, F. R. N., Schootemeijer, A., Schösser, E. C., Schürmann, C., Sen, K., Shahaf, S., Simón-Díaz, S., van Son, L. A. C., Stoop, M., Toonen, S., Tramper, F., Valli, R., Vigna-Gómez, A., Vink, J. S., Wang, C. and Willcox, R.
NatAs 9, 1337 (09/2025) - pySTARBURST99: The Next Generation of STARBURST99
Hawcroft, Calum, Leitherer, Claus, Aranguré, Oskar, Chisholm, John, Ekström, Sylvia, Martinet, Sébastien, Martins, Lucimara P., Meynet, Georges, Morisset, Christophe, Sander, Andreas A. C. and Wofford, Aida
ApJS 280, 5 (09/2025) - Hidden massive eclipsing binaries in red supergiant systems: The hierarchical triple system KQ Puppis and other candidates
Jadlovský, D., Molnár, L., Ercolino, A., Bernini-Peron, M., Mérand, A., Krtička, J., Wang, L., Ádám, R. Z., Baade, D., González-Torà, G., Granzer, T., Janík, J., Kolář, J., Kravchenko, K., Langer, N., Oskinova, L. M., Pauli, D., Ramachandran, V., Rubio, A. C., Sander, A. A. C., Strassmeier, K. G., Weber, M., Wittkowski, M., Brahm, R., Schaffenroth, V., Vanzi, L. and Skarka, M.
arXiv preprint (09/2025) - EWOCS-IV: 1Ms ACIS Chandra observation of the supergiant B[e] star Wd1-9
Anastasopoulou, K., Guarcello, M. G., Drake, J. J., Ritchie, B., De Becker, M., Bayo, A., Najarro, F., Negueruela, I., Sciortino, S., Flaccomio, E., Castellanos, R., Albacete-Colombo, J. F., Andersen, M., Damiani, F., Fraschetti, F., Gennaro, M., Gunderson, S. J., Larkin, C. J. K., Mackey, J., Moffat, A. F. J., Pradhan, P., Saracino, S., Stevens, I. R. and Weigelt, G.
A&A 701, A138 (09/2025) - Investigating dusty red supergiant outflows in Westerlund 1 with 3D hydrodynamic simulations
Larkin, C. J. K., Mackey, J., Haworth, T. J. and Sander, A. A. C.
A&A 700, A60 (08/2025) - Binarity at LOw Metallicity (BLOeM): Bayesian inference of natal kicks from inert black hole binaries
Willcox, R., Marchant, P., Vigna-Gómez, A., Sana, H., Bodensteiner, J., Deshmukh, K., Esseldeurs, M., Fabry, M., Hénault-Brunet, V., Janssens, S., Mahy, L., Patrick, L., Pauli, D., Renzo, M., Sander, A. A. C., Shenar, T., van Son, L. A. C. and Stoop, M.
A&A 700, A59 (08/2025) - Near-Eddington mass loss of hydrogen-rich Wolf-Rayet stars: Consequences of continuum acceleration, metallicity, and temperature
Lefever, R. R., Sander, A. A. C., Bernini-Peron, M., González-Torà, G., Moens, N. M., Najarro, F., Schösser, E. C., Sabhahit, G. N. and Vink, J. S.
A&A 700, A2 (08/2025) - Improving 1D stellar atmosphere models with insights from multidimensional simulations: II. 1D versus 3D model comparison for Wolf-Rayet stars
González-Torà, G., Sander, A. A. C., Moens, N., Sundqvist, J. O., Debnath, D., Delbroek, L., Josiek, J., Lefever, R. R., Van der Sijpt, C., Verhamme, O. and Bernini-Peron, M.
A&A 699, A244 (07/2025) - Implications of modern mass-loss rates for massive stars
Merritt, JD, Stevenson, Simon, Sander, Andreas, Mandel, Ilya, Riley, Jeff, Farr, Ben, van Son, L. A. C., Wagg, Tom, Vinciguerra, Serena and Jose, Holden
arXiv preprint (07/2025) - X-Shooting ULLYSES: Massive stars at low metallicity: XIII. Testing the bi-stability jump in the Large Magellanic Cloud
Alkousa, T., Crowther, P. A., Bestenlehner, J. M., Sana, H., Tramper, F., Vink, J. S., Pauli, D., van Loon, J. Th., Najarro, F., Kuiper, R., Sander, A. A. C. and Bernini-Peron, M.
A&A 699, A314 (07/2025) - Carbon-rich Dust Injected into the Interstellar Medium by Galactic WC Binaries Survives for Hundreds of Years
Richardson, Noel D., Henson, Micaela, Lieb, Emma P., Kehl, Corey, Lau, Ryan M., Williams, Peredur M., Corcoran, Michael F., Callingham, J. R., Chené, André-Nicolas, Gull, Theodore R., Hamaguchi, Kenji, Han, Yinuo, Hankins, Matthew J., Hill, Grant M., Hoffman, Jennifer L., Mackey, Jonathan, Moffat, Anthony F. J., Pope, Benjamin J. S., Pradhan, Pragati, Russell, Christopher M. P., Sander, Andreas A. C., St-Louis, Nicole, Stevens, Ian R., Tuthill, Peter, Weigelt, Gerd and White, Ryan M. T.
ApJ 987, 160 (07/2025) - Improving undergraduate astronomy students' skills with research literature via accessible summaries: An exploratory case study with Astrobites-based reading assignments
Lewis, Briley L., Waggoner, Abygail R., Clarke, Emma, Crisp, Alison L., Dodici, Mark, Doskoch, Graham M., Foley, Michael M., Golant, Ryan, Grayson, Skylar, Hegde, Sahil, Korhonen Cuestas, Nathalie, Law, Charles J., Lefever, R. R., Mishra, Ishan, Popinchalk, Mark, Sagynbayeva, Sabina, Wong, Samantha L., Yan, Wei, Astrobites Collaboration, Ingraham Dixie, Kaitlyn L. and Supriya, K.
PRPER 21, 010124 (06/2025) - Binarity at LOw Metallicity (BLOeM): Enhanced multiplicity of early B-type dwarfs and giants at Z = 0.2 Z⊙
Villaseñor, J. I., Sana, H., Mahy, L., Shenar, T., Bodensteiner, J., Britavskiy, N., Lennon, D. J., Moe, M., Patrick, L. R., Pawlak, M., Bowman, D. M., Crowther, P. A., de Mink, S. E., Deshmukh, K., Evans, C. J., Fabry, M., Fouesneau, M., Holgado, G., Langer, N., Maíz Apellániz, J., Mandel, I., Oskinova, L. M., Pauli, D., Ramachandran, V., Renzo, M., Rix, H.-W., Rocha, D. F., Sander, A. A. C., Schneider, F. R. N., Sen, K., Simón-Díaz, S., van Loon, J. Th., Toonen, S. and Vink, J. S.
A&A 698, A41 (06/2025) - Binarity at LOw Metallicity (BLOeM): The multiplicity properties and evolution of BAF-type supergiants
Patrick, L. R., Lennon, D. J., Najarro, F., Shenar, T., Bodensteiner, J., Sana, H., Crowther, P. A., Britavskiy, N., Langer, N., Schootemeijer, A., Evans, C. J., Mahy, L., Götberg, Y., de Mink, S. E., Schneider, F. R. N., O'Grady, A. J. G., Villaseñor, J. I., Bernini-Peron, M., Bowman, D. M., de Koter, A., Deshmukh, K., Gilkis, A., González-Torà, G., Kalari, V. M., Keszthelyi, Z., Mandel, I., Menon, A., Moe, M., Oskinova, L. M., Pauli, D., Renzo, M., Sander, A. A. C., Sen, K., Stoop, M., van Loon, J. Th., Toonen, S., Tramper, F., Vink, J. S. and Wang, C.
A&A 698, A39 (06/2025) - Binarity at LOw Metallicity (BLOeM): Multiplicity properties of Oe and Be stars
Bodensteiner, J., Shenar, T., Sana, H., Britavskiy, N., Crowther, P. A., Langer, N., Lennon, D. J., Mahy, L., Patrick, L. R., Villaseñor, J. I., Abdul-Masih, M., Bowman, D. M., de Koter, A., de Mink, S. E., Deshmukh, K., Fabry, M., Gilkis, A., Götberg, Y., Holgado, G., Izzard, R. G., Janssens, S., Kalari, V. M., Keszthelyi, Z., Kubát, J., Mandel, I., Maravelias, G., Oskinova, L. M., Pauli, D., Ramachandran, V., Rocha, D. F., Renzo, M., Sander, A. A. C., Schneider, F. R. N., Schootemeijer, A., Sen, K., Stoop, M., Toonen, S., van Loon, J. Th., Valli, R., Vigna-Gómez, A., Vink, J. S., Wang, C. and Xu, X.-T.
A&A 698, A38 (06/2025) - Binarity at LOw Metallicity (BLOeM): Multiplicity of early B-type supergiants in the Small Magellanic Cloud
Britavskiy, N., Mahy, L., Lennon, D. J., Patrick, L. R., Sana, H., Villaseñor, J. I., Shenar, T., Bodensteiner, J., Bernini-Peron, M., Berlanas, S. R., Bowman, D. M., Crowther, P. A., de Mink, S. E., Evans, C. J., Götberg, Y., Holgado, G., Johnston, C., Keszthelyi, Z., Klencki, J., Langer, N., Mandel, I., Menon, A., Moe, M., Oskinova, L. M., Pauli, D., Pawlak, M., Ramachandran, V., Renzo, M., Sander, A. A. C., Schneider, F. R. N., Schootemeijer, A., Sen, K., Simón-Díaz, S., van Loon, J. Th. and Vink, J. S.
A&A 698, A40 (06/2025) - Comprehensive UV and optical spectral analysis of Cygnus X-1: Stellar and wind parameters, abundances, and evolutionary implications
Ramachandran, V., Sander, A. A. C., Oskinova, L. M., Schösser, E. C., Pauli, D., Hamann, W.-R., Mahy, L., Bernini-Peron, M., Brigitte, M. and Kubátová, B.
A&A 698, A37 (06/2025) - Coupling hydrodynamics with comoving frame radiative transfer: III. The Wind Regime of Early-Type B Hypergiants
Bernini-Peron, M., Sander, A. A. C., Najarro, F., Sabhahit, G. N., Pauli, D., Lefever, R. R., Vink, J. S., Ramachandran, V., Oskinova, L. M., González-Torà, G. and Schösser, E. C.
A&A 697, A41 (05/2025) - First JWST/NIRSpec Spectroscopy of O Stars in the Small Magellanic Cloud
Mang Román, Armin, Zeidler, Peter, Hamann, Wolf-Rainer, Oskinova, Lidia M., Rickard, M. J., Reyero Serantes, S., Todt, H., Gallagher, J. S., Massa, D., Pauli, D., Ramachandran, V., Sabbi, E. and Sander, A. A. C.
ApJL 984, L49 (05/2025) - New empirical mass-loss recipe for UV radiation line-driven winds of hot stars across various metallicities
Pauli, D., Oskinova, L. M., Hamann, W.-R., Sander, A. A. C., Vink, J. S., Bernini-Peron, M., Josiek, J., Lefever, R. R., Sana, H. and Ramachandran, V.
A&A 697, A114 (05/2025) - Exploring the connection between atmosphere models and evolution models of very massive stars
Josiek, J., Sander, A. A. C., Bernini-Peron, M., Ekström, S., González-Torà, G., Lefever, R. R., Moens, N., Ramachandran, V. and Schösser, E. C.
A&A 697, A193 (05/2025) - X-Shooting ULLYSES: Massive stars at low metallicity: XII. Clumped winds of O-type (super)giants in the Large Magellanic Cloud
Brands, Sarah A., Backs, Frank, de Koter, Alex, Puls, Joachim, Crowther, Paul A., Sana, Hugues, Tramper, Frank, Kaper, Lex, Sundqvist, Jon O., Bestenlehner, Joachim M., Driessen, Florian A., Erba, Christiana, Hawcroft, Calum, Herrero, Artemio, John Hillier, D., Ignace, Richard, Lefever, Roel R., Dylan Kee, N., Kubátová, Brankica, Mahy, Laurent, Moffat, Anthony F. J., Najarro, Francisco, Prinja, Raman K., Ramachandran, Varsha, Sander, Andreas A. C., Vink, Jorick S. and XShootU Collaboration
A&A 697, A54 (05/2025) - A new mass estimate method with hydrodynamical atmospheres for very massive WNh stars
Sabhahit, Gautham N., Vink, Jorick S., Sander, Andreas A. C., Bernini-Peron, Matheus, Crowther, Paul A., Lefever, Roel R. and Shenar, Tomer
A&A 696, A200 (04/2025) - Strong nebular He II emission induced by He+ ionizing photons escaping through the clumpy winds of massive stars
Roy, A., Krumholz, M. R., Salvadori, S., Meynet, G., Ekström, S., Vink, J. S., Sander, A. A. C., Sutherland, R. S., Paul, S., Pallottini, A. and Skúladóttir, Á.
A&A 696, A29 (04/2025) - Extremely iron-poor O-type stars in the Magellanic Bridge
Schösser, E. C., Ramachandran, V., Sander, A. A. C., Gallagher, J. S., Bernini-Peron, M., González-Torà, G., Josiek, J., Lefever, R. R., Hamann, W.-R. and Oskinova, L. M.
A&A 696, L3 (04/2025) - X-Shooting ULLYSES: Massive stars at low metallicity: X. Physical parameters and feedback of massive stars in the LMC N11 B star-forming region
Gómez-González, V. M. A., Oskinova, L. M., Hamann, W.-R., Todt, H., Pauli, D., Reyero Serantes, S., Bernini-Peron, M., Sander, A. A. C., Ramachandran, V., Vink, J. S., Crowther, P. A., Berlanas, S. R., ud-Doula, A., Gormaz-Matamala, A. C., Kehrig, C., Kuiper, R., Leitherer, C., Mahy, L., McLeod, A. F., Mehner, A., Morrell, N., Shenar, T., Telford, O. G., van Loon, J. Th., Tramper, F. and Wofford, A.
A&A 695, A197 (03/2025) - X-Shooting ULLYSES: Massive stars at low metallicity: XI. Pipeline-determined physical properties of Magellanic Cloud OB stars
Bestenlehner, J. M., Crowther, P. A., Hawcroft, C., Sana, H., Tramper, F., Vink, J. S., Brands, S. A., Sander, A. A. C. and XShootU Collaboration
A&A 695, A198 (03/2025) - Not Just Winds: Why Models Find That Binary Black Hole Formation Is Metallicity-dependent, while Binary Neutron Star Formation Is Not
van Son, L. A. C., Roy, S. K., Mandel, I., Farr, W. M., Lam, A., Merritt, J., Broekgaarden, F. S., Sander, A. A. C. and Andrews, J. J.
ApJ 979, 209 (02/2025) - Improving 1D stellar atmosphere models with insights from multi-dimensional simulations: I. 1D versus 2D stratifications and spectral comparisons for O stars
González-Torà, G., Sander, A. A. C., Sundqvist, J. O., Debnath, D., Delbroek, L., Josiek, J., Lefever, R. R., Moens, N., Van der Sijpt, C. and Verhamme, O.
A&A 694, A269 (02/2025) - Misidentification of short GRBs as magnetars in nearby galaxies
Schösser, Elisa C., Burgess, J. Michael and Greiner, Jochen
MNRAS 537, 1430 (02/2025) - X-Shooting ULLYSES: Massive stars at low metallicity: VIII. Stellar and wind parameters of newly revealed stripped stars in Be binaries
Ramachandran, V., Sander, A. A. C., Pauli, D., Klencki, J., Backs, F., Tramper, F., Bernini-Peron, M., Crowther, P., Hamann, W.-R., Ignace, R., Kuiper, R., Oey, M. S., Oskinova, L. M., Shenar, T., Todt, H., Vink, J. S., Wang, L., Wofford, A. and the XShootU Collaboration
A&A 692, A90 (12/2024) - Determining stellar properties of massive stars in NGC346 in the SMC with a Bayesian statistic technique
Rickard, M. J., Hainich, R., Pauli, D., Hamann, W.-R., Oskinova, L. M., Prinja, R. K., Ramachandran, V., Todt, H., Schösser, E. C., Sander, A. A. C. and Zeidler, P.
A&A 692, A149 (12/2024) - Investigating 39 Galactic Wolf-Rayet stars with VLTI/GRAVITY: Uncovering a long-period binary desert
Deshmukh, K., Sana, H., Mérand, A., Bordier, E., Langer, N., Bodensteiner, J., Dsilva, K., Frost, A. J., Gosset, E., Le Bouquin, J.-B., Lefever, R. R., Mahy, L., Patrick, L. R., Reggiani, M., Sander, A. A. C., Shenar, T., Tramper, F., Villaseñor, J. I. and Waisberg, I.
A&A 692, A109 (12/2024) - X-Shooting ULLYSES: Massive Stars at low metallicity: IX. Empirical constraints on mass-loss rates and clumping parameters for OB supergiants in the Large Magellanic Cloud
Verhamme, O., Sundqvist, J., de Koter, A., Sana, H., Backs, F., Brands, S. A., Najarro, F., Puls, J., Vink, J. S., Crowther, P. A., Kubátová, B., Sander, A. A. C., Bernini-Peron, M., Kuiper, R., Prinja, R. K., Schillemans, P., Shenar, T., van Loon, J. Th. and XShootu collaboration
A&A 692, A91 (12/2024) - X-Shooting ULLYSES: Massive stars at low metallicity: VI. Atmosphere and mass-loss properties of O-type giants in the Small Magellanic Cloud
Backs, F., Brands, S. A., de Koter, A., Kaper, L., Vink, J. S., Puls, J., Sundqvist, J., Tramper, F., Sana, H., Bernini-Peron, M., Bestenlehner, J. M., Crowther, P. A., Hawcroft, C., Ignace, R., Kuiper, R., van Loon, J. Th., Mahy, L., Marcolino, W., Najarro, F., Oskinova, L. M., Pauli, D., Ramachandran, V., Sander, A. A. C. and Verhamme, O.
A&A 692, A88 (12/2024) - X-Shooting ULLYSES: Massive stars at low metallicity: VII. Stellar and wind properties of B supergiants in the Small Magellanic Cloud
Bernini-Peron, M., Sander, A. A. C., Ramachandran, V., Oskinova, L. M., Vink, J. S., Verhamme, O., Najarro, F., Josiek, J., Brands, S. A., Crowther, P. A., Gómez-González, V. M. A., Gormaz-Matamala, A. C., Hawcroft, C., Kuiper, R., Mahy, L., Marcolino, W. L. F., Martins, L. P., Mehner, A., Parsons, T. N., Pauli, D., Shenar, T., Schootemeijer, A., Todt, H., van Loon, J. Th. and XShootU Collaboration
A&A 692, A89 (12/2024) - Hot Star Winds
Sander, Andreas A. C.
arXiv preprint (10/2024) - Binarity at LOw Metallicity (BLOeM): A spectroscopic VLT monitoring survey of massive stars in the SMC
Shenar, T., Bodensteiner, J., Sana, H., Crowther, P. A., Lennon, D. J., Abdul-Masih, M., Almeida, L. A., Backs, F., Berlanas, S. R., Bernini-Peron, M., Bestenlehner, J. M., Bowman, D. M., Bronner, V. A., Britavskiy, N., de Koter, A., de Mink, S. E., Deshmukh, K., Evans, C. J., Fabry, M., Gieles, M., Gilkis, A., González-Torà, G., Gräfener, G., Götberg, Y., Hawcroft, C., Hénault-Brunet, V., Herrero, A., Holgado, G., Janssens, S., Johnston, C., Josiek, J., Justham, S., Kalari, V. M., Katabi, Z. Z., Keszthelyi, Z., Klencki, J., Kubát, J., Kubátová, B., Langer, N., Lefever, R. R., Ludwig, B., Mackey, J., Mahy, L., Maíz Apellániz, J., Mandel, I., Maravelias, G., Marchant, P., Menon, A., Najarro, F., Oskinova, L. M., O'Grady, A. J. G., Ovadia, R., Patrick, L. R., Pauli, D., Pawlak, M., Ramachandran, V., Renzo, M., Rocha, D. F., Sander, A. A. C., Sayada, T., Schneider, F. R. N., Schootemeijer, A., Schösser, E. C., Schürmann, C., Sen, K., Shahaf, S., Simón-Díaz, S., Stoop, M., Toonen, S., Tramper, F., van Loon, J. Th., Valli, R., van Son, L. A. C., Vigna-Gómez, A., Villaseñor, J. I., Vink, J. S., Wang, C. and Willcox, R.
A&A 690, A289 (10/2024) - Multi-wavelength spectroscopic analysis of the ULX Holmberg II X-1 and its nebula suggests the presence of a heavy black hole accreting from a B-type donor
Reyero Serantes, S., Oskinova, L., Hamann, W.-R., Gómez-González, V. M. A., Todt, H., Pauli, D., Soria, R., Gies, D. R., Torrejón, J. M., Bulik, T., Ramachandran, V., Sander, A. A. C., Bozzo, E. and Poutanen, J.
A&A 690, A347 (10/2024) - Observations of Extremely Metal-poor O Stars: Weak Winds and Constraints for Evolution Models
Telford, O. Grace, Chisholm, John, Sander, Andreas A. C., Ramachandran, Varsha, McQuinn, Kristen B. W. and Berg, Danielle A.
ApJ 974, 85 (10/2024) - Gas-phase Fe/O and Fe/N abundances in star-forming regions: Relations between nucleosynthesis, metallicity, and dust
Méndez-Delgado, J. E., Kreckel, K., Esteban, C., García-Rojas, J., Carigi, L., Sander, A. A. C., Palla, M., Chruślińska, M., De Looze, I., Relaño, M., van der Giessen, S. A., Reyes-Rodríguez, E. and Sánchez, S. F.
A&A 690, A248 (10/2024) - X-Shooting ULLYSES: Massive stars at low metallicity: V. Effect of metallicity on surface abundances of O stars
Martins, F., Bouret, J.-C., Hillier, D. J., Brands, S. A., Crowther, P. A., Herrero, A., Najarro, F., Pauli, D., Puls, J., Ramachandran, V., Sander, A. A. C., Vink, J. S. and XShootU Collaboration
A&A 689, A31 (09/2024) - New Wolf-Rayet wind yields and nucleosynthesis of Helium stars
Higgins, Erin R., Vink, Jorick S., Hirschi, Raphael, Laird, Alison M. and Sander, Andreas A. C.
MNRAS 533, 1095 (09/2024) - X-Shooting ULLYSES: Massive stars at low metallicity: IV. Spectral analysis methods and exemplary results for O stars
Sander, A. A. C., Bouret, J.-C., Bernini-Peron, M., Puls, J., Backs, F., Berlanas, S. R., Bestenlehner, J. M., Brands, S. A., Herrero, A., Martins, F., Maryeva, O., Pauli, D., Ramachandran, V., Crowther, P. A., Gómez-González, V. M. A., Gormaz-Matamala, A. C., Hamann, W.-R., Hillier, D. J., Kuiper, R., Larkin, C. J. K., Lefever, R. R., Mehner, A., Najarro, F., Oskinova, L. M., Schösser, E. C., Shenar, T., Todt, H., ud-Doula, A. and Vink, J. S.
A&A 689, A30 (09/2024) - Hydrodynamic simulation of Cygnus OB2: the absence of a cluster wind termination shock
Vieu, T., Larkin, C. J. K., Härer, L., Reville, B., Sander, A. A. C. and Ramachandran, V.
MNRAS 532, 2174 (08/2024) - X-Shooting ULLYSES: Massive stars at low metallicity. II. DR1: Advanced optical data products for the Magellanic Clouds
Sana, H., Tramper, F., Abdul-Masih, M., Blomme, R., Dsilva, K., Maravelias, G., Martins, L., Mehner, A., Wofford, A., Banyard, G., Barbosa, C. L., Bestenlehner, J., Hawcroft, C., John Hillier, D., Todt, H., Larkin, C. J. K., Mahy, L., Najarro, F., Ramachandran, V., Ramírez-Tannus, M. C., Rubio-Díez, M. M., Sander, A. A. C., Shenar, T., Vink, J. S., Backs, F., Brands, S. A., Crowther, P., Decin, L., de Koter, A., Hamann, W.-R., Kehrig, C., Kuiper, R., Oskinova, L., Pauli, D., Sundqvist, J., Verhamme, O. and Xshoot-U Collaboration
A&A 688, A104 (08/2024) - X-Shooting ULLYSES: Massive stars at low metallicity. III. Terminal wind speeds of ULLYSES massive stars
Hawcroft, C., Sana, H., Mahy, L., Sundqvist, J. O., de Koter, A., Crowther, P. A., Bestenlehner, J. M., Brands, S. A., David-Uraz, A., Decin, L., Erba, C., Garcia, M., Hamann, W.-R., Herrero, A., Ignace, R., Kee, N. D., Kubátová, B., Lefever, R., Moffat, A., Najarro, F., Oskinova, L., Pauli, D., Prinja, R., Puls, J., Sander, A. A. C., Shenar, T., St-Louis, N., ud-Doula, A. and Vink, J. S.
A&A 688, A105 (08/2024) - Impact of main sequence mass loss on the appearance, structure, and evolution of Wolf-Rayet stars
Josiek, J., Ekström, S. and Sander, A. A. C.
A&A 688, A71 (08/2024) - Astrobites: A global outreach collaboration by PhD students
Lefever, Roel
eas, in press (07/2024) - Peering into the Wolf-Rayet phenomenon through [WO] and [WC] stars
Toalá, Jesús A., Todt, Helge and Sander, Andreas A. C.
MNRAS 531, 2422 (06/2024) - Chemical abundances and ionizing mechanisms in the star-forming double-ring of AM 0644-741 using MUSE data
Gómez-González, V. M. A., Mayya, Y. D., Zaragoza-Cardiel, J., Bruzual, G., Charlot, S., Ramos-Larios, G., Oskinova, L. M., Sander, A. A. C. and Serantes, S. Reyero
MNRAS 529, 4369 (04/2024) - M5 - Mars Magnetospheric Multipoint Measurement Mission: A multi-spacecraft plasma physics mission to Mars
Larkin, Cormac J. K., Lundén, Ville, Schulz, Leonard, Baumgartner-Steinleitner, Markus, Brekkum, Marianne, Cegla, Adam, Dazzi, Pietro, Iuliis, Alessia De, Gesch, Jonas, Lennerstrand, Sofia, Nesbit-Östman, Sara, Pires, Vasco D. C., Palanca, Inés Terraza, Teubenbacher, Daniel, Enengl, Florine and Hallmann, Marcus
AdSpR 73, 3235 (03/2024) - X-Shooting ULLYSES: Massive Stars at Low Metallicity
Vink, J. S., Crowther, P., Fullerton, A., Garcia, M., Martins, F., Morrell, N., Oskinova, L., St Louis, N., ud-Doula, A., Sander, A., Sana, H., Bouret, J.-C., Kubatova, B., Marchant, P., Martins, L. P., Wofford, A., van Loon, J., Telford, O. G., Götberg, Y., Bowman, D., Erba, C., Kalari, V. and XShootU Collaboration
Msngr 192, 16 (03/2024) - The Wide-field Spectroscopic Telescope (WST) Science White Paper
Mainieri, Vincenzo, Anderson, Richard I., Brinchmann, Jarle, Cimatti, Andrea, Ellis, Richard S., Hill, Vanessa, Kneib, Jean-Paul, McLeod, Anna F., Opitom, Cyrielle, Roth, Martin M., Sanchez-Saez, Paula, Smiljanic, Rodolfo, Tolstoy, Eline, Bacon, Roland, Randich, Sofia, Adamo, Angela, Annibali, Francesca, Arevalo, Patricia, Audard, Marc, Barsanti, Stefania, Battaglia, Giuseppina, Bayo Aran, Amelia M., Belfiore, Francesco, Bellazzini, Michele, Bellini, Emilio, Beltran, Maria Teresa, Berni, Leda, Bianchi, Simone, Biazzo, Katia, Bisero, Sofia, Bisogni, Susanna, Bland-Hawthorn, Joss, Blondin, Stephane, Bodensteiner, Julia, Boffin, Henri M. J., Bonito, Rosaria, Bono, Giuseppe, Bouche, Nicolas F., Bowman, Dominic, Braga, Vittorio F., Bragaglia, Angela, Branchesi, Marica, Brucalassi, Anna, Bryant, Julia J., Bryson, Ian, Busa, Innocenza, Camera, Stefano, Carbone, Carmelita, Casali, Giada, Casali, Mark, Casasola, Viviana, Castro, Norberto, Catelan, Marcio, Cavallo, Lorenzo, Chiappini, Cristina, Cioni, Maria-Rosa, Colless, Matthew, Colzi, Laura, Contarini, Sofia, Couch, Warrick, D'Ammando, Filippo, d'Assignies D., William, D'Orazi, Valentina, da Silva, Ronaldo, Dainotti, Maria Giovanna, Damiani, Francesco, Danielski, Camilla, De Cia, Annalisa, de Jong, Roelof S., Dhawan, Suhail, Dierickx, Philippe, Driver, Simon P., Dupletsa, Ulyana, Escoffier, Stephanie, Escorza, Ana, Fabrizio, Michele, Fiorentino, Giuliana, Fontana, Adriano, Fontani, Francesco, Forero Sanchez, Daniel, Franois, Patrick, Galindo-Guil, Francisco Jose, Gallazzi, Anna Rita, Galli, Daniele, Garcia, Miriam, Garcia-Rojas, Jorge, Garilli, Bianca, Grand, Robert, Guarcello, Mario Giuseppe, Hazra, Nandini, Helmi, Amina, Herrero, Artemio, Iglesias, Daniela, Ilic, Dragana, Irsic, Vid, Ivanov, Valentin D., Izzo, Luca, Jablonka, Pascale, Joachimi, Benjamin, Kakkad, Darshan, Kamann, Sebastian, Koposov, Sergey, Kordopatis, Georges, Kovacevic, Andjelka B., Kraljic, Katarina, Kuncarayakti, Hanindyo, Kwon, Yuna, La Forgia, Fiorangela, Lahav, Ofer, Laigle, Clotilde, Lazzarin, Monica, Leaman, Ryan, Leclercq, Floriane, Lee, Khee-Gan, Lee, David, Lehnert, Matt D., Lira, Paulina, Loffredo, Eleonora, Lucatello, Sara, Magrini, Laura, Maguire, Kate, Mahler, Guillaume, Zahra Majidi, Fatemeh, Malavasi, Nicola, Mannucci, Filippo, Marconi, Marcella, Martin, Nicolas, Marulli, Federico, Massari, Davide, Matsuno, Tadafumi, Mattheee, Jorryt, McGee, Sean, Merc, Jaroslav, Merle, Thibault, Miglio, Andrea, Migliorini, Alessandra, Minchev, Ivan, Minniti, Dante, Miret-Roig, Nuria, Monreal Ibero, Ana, Montano, Federico, Montet, Ben T., Moresco, Michele, Moretti, Chiara, Moscardini, Lauro, Moya, Andres, Mueller, Oliver, Nanayakkara, Themiya, Nicholl, Matt, Nordlander, Thomas, Onori, Francesca, Padovani, Marco, Pala, Anna Francesca, Panda, Swayamtrupta, Pandey-Pommier, Mamta, Pasquini, Luca, Pawlak, Michal, Pessi, Priscila J., Pisani, Alice, Popovic, Lukav C., Prisinzano, Loredana, Raddi, Roberto, Rainer, Monica, Rebassa-Mansergas, Alberto, Richard, Johan, Rigault, Mickael, Rocher, Antoine, Romano, Donatella, Rosati, Piero, Sacco, Germano, Sanchez-Janssen, Ruben, Sander, Andreas A. C., Sanders, Jason L., Sargent, Mark, Sarpa, Elena, Schimd, Carlo, Schipani, Pietro, Sefusatti, Emiliano, Smith, Graham P., Spina, Lorenzo, Steinmetz, Matthias, Tacchella, Sandro, Tautvaisiene, Grazina, Theissen, Christopher, Thomas, Guillaume, Ting, Yuan-Sen, Travouillon, Tony, Tresse, Laurence, Trivedi, Oem, Tsantaki, Maria, Tsedrik, Maria, Urrutia, Tanya, Valenti, Elena, Van der Swaelmen, Mathieu, Van Eck, Sophie, Verdiani, Francesco, Verdier, Aurelien, Vergani, Susanna Diana, Verhamme, Anne, Vernet, Joel, Verza, Giovanni, Viel, Matteo, Vielzeuf, Pauline, Vietri, Giustina, Vink, Jorick S., Viscasillas Vazquez, Carlos, Wang, Hai-Feng, Weilbacher, Peter M., Wendt, Martin, Wright, Nicholas, Ye, Quanzhi, Yeche, Christophe, Yu, Jiaxi, Zafar, Tayyaba, Zibetti, Stefano, Ziegler, Bodo and Zinchenko, Igor
Whitepaper (03/2024) - The effect of winds on atmospheric layers of red supergiants II. Modelling VLTI/GRAVITY and MATISSE observations of AH Sco, KW Sgr, V602 Car, CK Car, and V460 Car
González-Torà, G., Wittkowski, M., Davies, B. and Plez, B.
A&A 683, A19 (03/2024) - Aperture and Resolution Effects on Ultraviolet Star-forming Properties: Insights from Local Galaxies and Implications for High-redshift Observations
Clark, Ilyse, Berg, Danielle A., Leitherer, Claus, Arellano-Córdova, Karla Z. and Sander, Andreas A. C.
ApJ 964, 25 (03/2024) - Exploring the Effects of Astrobites Lesson Plans on Undergraduate Astronomy Students
Lewis, Briley, Waggoner, Abygail, Clarke, Emma, Crisp, Alison, Dodici, Mark, Doskoch, Graham, Foley, Michael, Golant, Ryan, Gozman, Katya, Hegde, Sahil, Huston, Macy, Law, Charles, Lefever, Roel, Mishra, Ishan, Popinchalk, Mark, Sagynbayeva, Sabina, Yan, Wei, Ingraham Dixie, Kaitlin and Supriya, K.
AAS 243, 345.08 (02/2024) - A soft and transient ultraluminous X-ray source with six-hour modulation in the NGC 300 galaxy
Sacchi, A., Esposito, P., de Martino, D., Soria, R., Israel, G. L., Sander, A. A. C., Sidoli, L., Buckley, D. A. H., Monageng, I. M., Tiengo, A., Arca Sedda, M., Pinto, C., Di Stefano, R., Imbrogno, M., Carleo, A. and Rivolta, G.
A&A 682, A151 (02/2024) - Optically thick structure in early B-type supergiant stellar winds at low metallicities
Parsons, Timothy N., Prinja, Raman K., Bernini-Peron, Matheus, Fullerton, Alex W., Massa, Derck L., Oskinova, Lidia M., Pauli, Daniel, Rickard, Matthew J. and Sander, Andreas A. C.
MNRAS 527, 11422 (02/2024) - Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars
Lefever, R. R., Shenar, T., Sander, A. A. C., Poniatowski, L., Dsilva, K. and Todt, H.
IAUS 361, 505 (12/2023) - Constraining physical processes in pre-supernovae massive star evolution
Higgins, Erin R., Vink, Jorick S., Sander, Andreas and Hirschi, Raphael
IAUS 361, 224 (12/2023) - Clumping and X-rays in cool B-Supergiants
Bernini-Peron, Matheus, Marcolino, W. L. F. and Sander, A. A. C.
IAUS 361, 182 (12/2023) - Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7
Ramachandran, Varsha
IAUS 361, 329 (12/2023) - On the Z-(in)dependence of the Humphreys-Davidson Limit
Sabhahit, Gautham N., Vink, Jorick S., Higgins, Erin R. and Sander, Andreas A. C.
IAUS 361, 416 (12/2023) - The enigmatic winds of Wolf-Rayet stars: Results from dynamically consistent atmosphere modelling
Sander, Andreas A. C.
IAUS 361, 473 (12/2023) - Constraints on the multiplicity of the most massive stars known: R136 a1, a2, a3, and c
Shenar, T., Sana, H., Crowther, P. A., Bostroem, K. A., Mahy, L., Najarro, F., Oskinova, L. and Sander, A. A. C.
A&A 679, A36 (11/2023) - Very massive stars and pair-instability supernovae: mass-loss framework for low metallicity
Sabhahit, Gautham N., Vink, Jorick S., Sander, Andreas A. C. and Higgins, Erin R.
MNRAS 524, 1529 (09/2023) - Clumping and X-rays in cooler B supergiant stars
Bernini-Peron, M., Marcolino, W. L. F., Sander, A. A. C., Bouret, J.-C., Ramachandran, V., Saling, J., Schneider, F. R. N., Oskinova, L. M. and Najarro, F.
A&A 677, A50 (09/2023) - Improving Undergraduate Astronomy Students' Skills with Research Literature via Accessible Summaries: An Exploratory Case Study with Astrobites-based Reading Assignments
Lewis, Briley L., Waggoner, Abygail R., Clarke, Emma, Crisp, Alison L., Dodici, Mark, Doskoch, Graham M., Foley, Michael M., Golant, Ryan, Grayson, Skylar, Hegde, Sahil, Korhonen Cuestas, Nathalie, Law, Charles J., Lefever, R. R., Mishra, Ishan, Popinchalk, Mark, Sagynbayeva, Sabina, Wong, Samantha L., Yan, Wei, Ingraham Dixie, Kaitlin L. and Supriya, K.
submitted to the Journal of Science Education and Technology (JSET) (09/2023) - From Dust to Nanodust: Resolving Circumstellar Dust from the Colliding-wind Binary Wolf-Rayet 140
Lau, Ryan M., Wang, Jason, Hankins, Matthew J., Currie, Thayne, Deo, Vincent, Endo, Izumi, Guyon, Olivier, Han, Yinuo, Jones, Anthony P., Jovanovic, Nemanja, Lozi, Julien, Moffat, Anthony F. J., Onaka, Takashi, Ruane, Garreth, Sander, Andreas A. C., Tinyanont, Samaporn, Tuthill, Peter G., Weigelt, Gerd, Williams, Peredur M. and Vievard, Sebastien
ApJ 951, 89 (07/2023) - X-Shooting ULLYSES: Massive stars at low metallicity. I. Project description
Vink, Jorick S., Mehner, A., Crowther, P. A., Fullerton, A., Garcia, M., Martins, F., Morrell, N., Oskinova, L. M., St-Louis, N., ud-Doula, A., Sander, A. A. C., Sana, H., Bouret, J.-C., Kubátová, B., Marchant, P., Martins, L. P., Wofford, A., van Loon, J. Th., Grace Telford, O., Götberg, Y., Bowman, D. M., Erba, C., Kalari, V. M., Abdul-Masih, M., Alkousa, T., Backs, F., Barbosa, C. L., Berlanas, S. R., Bernini-Peron, M., Bestenlehner, J. M., Blomme, R., Bodensteiner, J., Brands, S. A., Evans, C. J., David-Uraz, A., Driessen, F. A., Dsilva, K., Geen, S., Gómez-González, V. M. A., Grassitelli, L., Hamann, W.-R., Hawcroft, C., Herrero, A., Higgins, E. R., John Hillier, D., Ignace, R., Istrate, A. G., Kaper, L., Kee, N. D., Kehrig, C., Keszthelyi, Z., Klencki, J., de Koter, A., Kuiper, R., Laplace, E., Larkin, C. J. K., Lefever, R. R., Leitherer, C., Lennon, D. J., Mahy, L., Maíz Apellániz, J., Maravelias, G., Marcolino, W., McLeod, A. F., de Mink, S. E., Najarro, F., Oey, M. S., Parsons, T. N., Pauli, D., Pedersen, M. G., Prinja, R. K., Ramachandran, V., Ramírez-Tannus, M. C., Sabhahit, G. N., Schootemeijer, A., Reyero Serantes, S., Shenar, T., Stringfellow, G. S., Sudnik, N., Tramper, F. and Wang, L.
A&A 675, A154 (07/2023) - A partially stripped massive star in a Be binary at low metallicity. A missing link towards Be X-ray binaries and double neutron star mergers
Ramachandran, V., Klencki, J., Sander, A. A. C., Pauli, D., Shenar, T., Oskinova, L. M. and Hamann, W.-R.
A&A 674, L12 (06/2023) - Exploring the influence of different velocity fields on Wolf-Rayet star spectra
Lefever, R. R., Sander, A. A. C., Shenar, T., Poniatowski, L. G., Dsilva, K. and Todt, H.
MNRAS 521, 1374 (05/2023) - Spectroscopic and evolutionary analyses of the binary system AzV 14 outline paths toward the WR stage at low metallicity
Pauli, D., Oskinova, L. M., Hamann, W.-R., Bowman, D. M., Todt, H., Shenar, T., Sander, A. A. C., Erba, C., Gómez-González, V. M. A., Kehrig, C., Klencki, J., Kuiper, R., Mehner, A., de Mink, S. E., Oey, M. S., Ramachandran, V., Schootemeijer, A., Reyero Serantes, S. and Wofford, A.
A&A 673, A40 (05/2023) - Looking for nebular He II emission south of the multiple-massive star system, HD 5980
Sixtos, A., Wofford, A., Sander, A. A. C. and Peimbert, A.
MNRAS 519, 5656 (03/2023) - Bringing Stellar Evolution and Feedback Together: Summary of Proposals from the Lorentz Center Workshop
Geen, Sam, Agrawal, Poojan, Crowther, Paul A., Keller, B. W., de Koter, Alex, Keszthelyi, Zsolt, van de Voort, Freeke, Ali, Ahmad A., Backs, Frank, Bonne, Lars, Brugaletta, Vittoria, Derkink, Annelotte, Ekström, Sylvia, Fichtner, Yvonne A., Grassitelli, Luca, Götberg, Ylva, Higgins, Erin R., Laplace, Eva, You Liow, Kong, Lorenzo, Marta, McLeod, Anna F., Meynet, Georges, Newsome, Megan, Oliva, G. André, Ramachandran, Varsha, Rey, Martin P., Rieder, Steven, Romano-Díaz, Emilio, Sabhahit, Gautham, Sander, Andreas A. C., Sarwar, Rafia, Stinshoff, Hanno, Stoop, Mitchel, Szécsi, Dorottya, Trebitsch, Maxime, Vink, Jorick S. and Winch, Ethan
PASP 135, 021001 (02/2023) - The temperature dependency of Wolf-Rayet-type mass loss. An exploratory study for winds launched by the hot iron bump
Sander, A. A. C., Lefever, R. R., Poniatowski, L. G., Ramachandran, V., Sabhahit, G. N. and Vink, J. S.
A&A 670, A83 (02/2023) - Winds of OB stars: impact of metallicity, rotation and binary interaction
Ramachandran, Varsha
IAUS 370, 223 (12/2022) - The Driving of Hot Star Winds
Sander, Andreas A. C.
IAUS 370, 130 (12/2022) - Massive Stars in the Far and Extreme Ultraviolet
Sander, Andreas A. C.
Proceedings of the IAU General Assembly 2022 (Astronomy in Focus, Focus Meeting 4) (11/2022) - Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
Ramachandran, V., Oskinova, L. M., Hamann, W.-R., Sander, A. A. C., Todt, H., Pauli, D., Shenar, T., Torrejón, J. M., Postnov, K. A., Blondin, J. M., Bozzo, E., Hainich, R. and Massa, D.
A&A 667, A77 (11/2022) - Massive star feedback in the Magellanic Clouds and the tidal Bridge
Ramachandran, Varsha
Proceedings of the IAU General Assembly 2022 (Astronomy in Focus, Focus Meeting 4) (11/2022) - The hydrogen clock to infer the upper stellar mass
Higgins, Erin R., Vink, Jorick S., Sabhahit, Gautham N. and Sander, Andreas A. C.
MNRAS 516, 4052 (11/2022) - Stellar wind properties of the nearly complete sample of O stars in the low metallicity young star cluster NGC 346 in the SMC galaxy
Rickard, M. J., Hainich, R., Hamann, W.-R., Oskinova, L. M., Prinja, R. K., Ramachandran, V., Pauli, D., Todt, H., Sander, A. A. C., Shenar, T., Chu, Y.-H. and Gallagher, J. S.
A&A 666, A189 (10/2022) - Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars
Lefever, Roel R., Shenar, Tomer, Sander, Andreas A. C., Poniatowski, Luka, Dsilva, Karan and Todt, Helge
Proceedings of the IAUS 361: Massive Stars Near and Far (09/2022) - Mass-loss implementation and temperature evolution of very massive stars
Sabhahit, Gautham N., Vink, Jorick S., Higgins, Erin R. and Sander, Andreas A. C.
MNRAS 514, 3736 (08/2022) - Ionization and Star Formation in the Giant H II Region SMC-N66
Geist, E., Gallagher, J. S., Kotulla, R., Oskinova, L., Hamann, W.-R., Ramachandran, V., Sabbi, E., Smith, L., Kniazev, A., Nota, A. and Rickard, M. J.
PASP 134, 064301 (06/2022) - Wind properties of Milky Way and SMC massive stars: empirical Z dependence from CMFGEN models
Marcolino, W. L. F., Bouret, J.-C., Rocha-Pinto, H. J., Bernini-Peron, M. and Vink, J. S.
MNRAS 511, 5104 (04/2022) - The earliest O-type eclipsing binary in the Small Magellanic Cloud, AzV 476: A comprehensive analysis reveals surprisingly low stellar masses
Pauli, D., Oskinova, L. M., Hamann, W.-R., Ramachandran, V., Todt, H., Sander, A. A. C., Shenar, T., Rickard, M., Maíz Apellániz, J. and Prinja, R.
A&A 659, A9 (03/2022) - The origin and impact of Wolf-Rayet-type mass loss
Sander, Andreas A. C., Vink, Jorick S., Higgins, Erin R., Shenar, Tomer, Hamann, Wolf-Rainer and Todt, Helge
IAUS 366, 21 (12/2021) - The Link between Hot and Cool Outflows
Vink, Jorick S., Sander, A. A. C., Higgins, E. R. and Sabhahit, G. N.
IAUS 366, 96 (12/2021) - Superadiabaticity and the metallicity independence of the Humphreys-Davidson limit
Sabhahit, Gautham N., Vink, Jorick S., Higgins, Erin R. and Sander, Andreas A. C.
MNRAS 506, 4473 (09/2021)
Reviews and Outreach Publications
- Vom Winde verweht: Die Winde heißer Sterne verändern kosmische Strukturen und unser Bild vom Leben massereicher Sterne
Andreas A.C. Sander
Physik Journal, Mai 2022, S28ff (05/2022)
