Homepage of Priv. Doz. Dr. Andreas Koch-Hansen
I am a tenured research astronomer and my research focuses on the study of the Milky Way Galaxy using a variety of tracers and methods. As such, I study all questions related to ``Galactic Astronomy'', mainly through the tool of ``chemical tagging''. Overall, my interests include
|Chemical abundance measurements in and orbital histories of globular clusters, dwarf galaxies, and field stars in the various Galactic components (disks/bulge/halo).|
|Dynamical studies of star clusters, dark matter in dwarf galaxies.|
|Morphology of galaxies in the Local Universe.|
The ``Galactic halos and bulges'' group
Group members (left to right):
Matthias Frank (Postdoc 2012-2017); Nikolay Kacharov (PhD 2015); Benjamin Hendricks (PhD 2015); Michael Seifert (MSc 2016); Emma L.E. Knudsen (BSc 2018, Aalborg University); Ivalu B. Christensen (BSc 2018, Aalborg University); Michael Czuray (Staatsexamen 2015); Karolin Voss (Visiting student 2018)
All the above research projects offer a broad range and great pool for Bachelor, Master, or PhD theses. Possible projects involve
- A Chemical characterization of very wide binaries (at separations of up to 1 pc).
- Chemodynamic characterisation of low-latitude star clusters.
- Properties of dwarf galaxies in the vicinity of galaxies in the Local Volume, and the relation to the host galaxies' halos.
News & job opportunities
- Postdoc position available!
- Nov. 30, 2018: We have officially been awarded the third extension of SFB 881 ``The Milky System''.
Within this huge, collaborative research center that encompasses all of Heidelberg's six astronomy institutes,
my group was awared three projects (see also the student opportunities above).
- A03: Wide binaries
- A05: Low-latitude star clusters
- A11: The chemodynamic properties of the oldest components of the Galactic bulge
As my research is primarily observationally based, data for the projects I and my collaborators are involved in come from a variety of sources.
Some relevant examples (not to mention the obvious multi-object instruments such as ESO's FLAMES are listed here.
- Over the years, I have been majorly involved in planning for the 4-metre Multi-Object Spectroscopic Telescope (4MOST) survey, and my group has largely contributed to setting the instrument's specification, with first publications being Caffau et al. (2013) and Hansen et al. (2015).
- We are currently carrying out a spectroscopic survey with AAOMega to target unknown star clusters at low Galactic latitudes (see also these recent examples on FSR 1716, Gaia 1, and ESO452-Sc11.
- Using a dedicated 70-cm telescope in Lockwood Valley, CA (USA), we are conducting the ``Halos and EnviRonments Of Near-by galaxies (HERON)'' survey that aims at measuring the properties of galaxies in the Local Volume to unprecedented, low surface brightnesses.
- My group has developed a narrow-band system for the LBT/LBC to target C- and M-stars as tracers of recent star formation event in galaxies such as Andromeda (M31).