Rainer Spurzem

apl. Prof. at ZAH-ARI, Univ. of Heidelberg and part time Research Professor at NAOC/CAS
Computational Stellar Dynamics Group ( Silk Road Project )
Up to Date Publication List by ADS (Strasbourg Site)

Code Download Links: NBODY6++GPU (Wang et al. 2015)
Gaseous Model (Giersz & Spurzem 1994)    Old NBODY6++ (Spurzem 1999)

Astronomisches Rechen-Institut , Zentrum für Astronomie der Univ. Heidelberg ,
Mönchhofstrasse 12-14, D-69120 Heidelberg, Germany
Phone: +49-6221-54-1830; Fax: +49-6221-54-1888; Email: spurzem@ari.uni-heidelberg.de
Office Location: Room No. N.E-01, ground floor, main building (Neubau).
Member of Astronomische Gesellschaft , European Astronomical Society , International Astronomical Union

Beijing: National Astronomical Observatories, Chinese Academy of Sciences
A20 Datun Rd., Chaoyang Distr., Beijing 100012, China
Office A121; Contact: Silk Road Project Office Mrs. Hazel Wei , +86 10 6480 6001
Main Fields of Research (these link-anchors lead directly to short paragraphs below on this page):
Stellar and Galactic Dynamics , Stellar and Planetary Dynamics , Direct N-Body Simulations , Special Purpose Computing

GRACE Project ``Astrophysical Supercomputing on Accelerated Many-Core Hardware (GPU/FPGA)'' funded by Volkswagen Foundation

Participation in SFB881 ``The Milky Way System'', infrastructure project Z2 with GPU accelerated supercomputer at FZ Jüich , see our article in the INSIDE Supercomputing Journal of European supercomputing centers.
Virgo-EGO Scientific Forum Ego1 logo
Dense Star Clusters as Sources of Gravitational Waves (project page)

MODEST - Modelling Dense Stellar Systems Internat. Working Group


Stellar and Galactic Dynamics:

Dynamics of (globular) star clusters, galaxies and galactic nuclei; Study of the effects of rotation, mass segregation, primordial binaries and central massive objects on the evolution of dense stellar systems. Using anisotropic gaseous models , direct solutions of the Fokker-Planck equation and Monte Carlo methods to simulate numerically the effects of stellar evolution, a realistic mass spectrum, galactic tidal fields on the evolution of dense young or globular star clusters. Using particle methods ( SPH = Smoothed Particle Hydrodynamics, some SPH-links: St. Andrews , Tübingen ) to study the combined evolution of stellar systems and interstellar matter, e.g. for chemodynamical models of galaxy formation. External collaborations in this field (internal see Members of the Gang ):

  • Mirek Giersz, Nicolaus Copernicus Astronomical Centre, Warsaw , Monte Carlo models of star clusters with binaries
    David Merritt , Andras Szell, RIT - Rochester Inst. of Technology, New York State, USA , Black Holes in Dense Stellar Clusters
  • Hyung Mok Lee and Eunhyeuk Kim, Dept. of Astronomy, Univ. of Seoul, Korea Models of rotating star clusters

    Stellar and Planetary Dynamics:

    Formation of Protoplanets in disks of merging and fragmenting planetesimals, runaway and oligarchic growth, interaction with disks, based on direct N-Body simulation models. The influence of stellar encounters on the evolution of orbital parameters of planetary systems in star clusters. Participation planned in DFG Schwerpunkt ("Focused Research Programme" of German Science Foundation) on "Extrasolar Planets" . Collaborations in this field:

  • Doug Lin , Univ. of California
  • Shigeru Ida , Tokyo Institute of Technology
  • Eiichiro Kokubo , National Astronomical Observatory of Japan
    MPIA Heidelberg Jens Rodmann

    Direct N-Body Simulations:

    Direct N-body Simulations of collisional star clusters (globulars, young dense, around galactic central black holes) using NBODY6++ (a download area here ) - a special variant of NBODY6 (a download area here , direct force integration programme originally written by Sverre Aarseth) for massively parallel supercomputers. Supported platforms include ALiCE at the Univ. Wuppertal (see also the web page of Thomas Lippert for more information), or general supercomputers such as Hitachi SR8000 , IBM RS/6000 SP and CRAY T3E (in memoriam Seymour Cray, new link!), visualization of the results with NEMO. External collaborations in this field with:

  • Sverre Aarseth , Inst. of Astronomy Cambridge
  • Jun Makino , University of Tokyo
  • Douglas Heggie , Dept. of Maths. and Stats. Univ of Edinburgh
  • Paolo Miocchi , Roberto Capuzzo-Dolcetta , La Sapienza Universita di Roma
  • We acknowledge supercomputing time at: HLRS Stuttgart , NIC Jülich , SSC Karlsruhe
  • We acknowledge numerous TRACS research visits supported by the Edinburgh Parallel Computing Centre.
  • Other interesting supercomputer centres: LRZ München , ZIB Berlin , Hochleistungsrechner Nord (HLRN) .

    Special Purpose Computing

    Participation in the development and astrophysical application of special purpose computers, in particular FPGA ) in combination with GRAPE (the GRACE = GRAPE + RACE or ASPH(E)RIC project. This research is in cooperation with Lehrstuhl 5, Technische Informatik at the Univ. Mannheim and the Max Planck Institut für Astronomie in Heidelberg, and a proposal for another SFB-Transregio is in the early planning stage. GRAPE (=GRAvity PipE) are extremely fast special purpose machines to compute direct gravitational forces in N-body simulations. They have been invented and designed at Dept. of Astronomy and Dept. of Earth Science and Astronomy of the College of Arts and Sciences of the University of Tokyo ; nowadays GRAPE development is located at Hongo Campus and Komaba Campus of the University of Tokyo . The collaborators in this project are:

  • Gerhard Lienhart , Andreas Kugel , Reiner Männer , Univ. Mannheim
    Markus Wetzstein, Andi Burkert , Univ. Observatory Munich
  • Jun Makino , Toshiyuki Fukushige , University of Tokyo


    The Members of the Gang:



    Former Members:



    Selected Conferences/Workshops

    Order and Chaos in Stellar and Planetary Systems , St. Peterburg, Russia, 17-24 August 2003 (to celebrate birthdays of T. Agekian (90) and V. Antonov (70).

    Joint Discussion No. 11 , Sydney, Australia, 18. July 2003, in the framework of XXVth IAU General Assembly

    JENAM2003 , Budapest, Hungary, 23-30 August 2003, Minisymposium on Galactic Dynamics

    JENAM2002 , Porto, Portugal, 3-7 September 2002, Workshop on Galactic Dynamics

    Euro-Conference The Evolution of Galaxies III. From Simple Approaches to Self-Consistent Models , July 15-20, 2002, Kiel, Germany

    Scientific Frontiers in Research on Extrasolar Planets June 18-21, 2002, Washington D.C., USA

    New Horizons in Globular Cluster Astronomy , June 24-28, 2002, Padova, Italy

    JENAM2001 , Sept. 10-15, Munich, Germany, Mini-Symposium 5 Evolution of Galaxies - Observation and Dynamics

    Astrophysical Supercomputing using Particle Simulations , July 10-13, 2001, Tokyo, Japan

    star2000 - Dynamics of Star Clusters and The Milky Way International Spring Meeting of the Astronomische Gesellschaft March 20-24, 2000, Heidelberg, Germany, on the occasion of the 300th anniversary of the Kalenderpatent


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    Last update of this page: April 2005