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Constraining the internal dynamics of stellar systems using the NMAGIC particle code

Published online by Cambridge University Press:  01 July 2007

Flavio De Lorenzi ,
Ortwin Gerhard ,
Victor P. Debattista ,
Niranjan Sambhus ,
L. Coccato ,
M. Arnaboldi ,
M. Capaccioli ,
N. G. Douglas ,
K. C. Freeman  and
K. Kuijken
...Show all authors
Flavio De Lorenzi*
Affiliation:
Max-Planck-Institut für Ex. Physik, Giessenbachstraße, D-85741 Garching, Germany Astron. Institut, Universität Basel, Venusstrasse 7, Binningen, CH-4102, Switzerland
Ortwin Gerhard
Affiliation:
Max-Planck-Institut für Ex. Physik, Giessenbachstraße, D-85741 Garching, Germany
Victor P. Debattista
Affiliation:
Centre for Astrophysics, University of Central Lancashire, Preston, UK PR1 2HE
Niranjan Sambhus
Affiliation:
Astron. Institut, Universität Basel, Venusstrasse 7, Binningen, CH-4102, Switzerland
L. Coccato
Affiliation:
Max-Planck-Institut für Ex. Physik, Giessenbachstraße, D-85741 Garching, Germany Kapteyn Astronomical Institute, University of Groningen, the Netherlands
M. Arnaboldi
Affiliation:
ESO, Karl-Schwarzschild-Str. 2, D-85748 GarchingGermany INAF, Observatory of Turin, Strada Osservatorio 20, 10025 Pino Torinese, Italy
M. Capaccioli
Affiliation:
Osservatorio di Capodimonte, Naples, Italy
N. G. Douglas
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, the Netherlands
K. C. Freeman
Affiliation:
Research School of Astronomy & Astrophysics, ANU, Canberra, Australia
K. Kuijken
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, the Netherlands University of Leiden, The Netherlands
M. R. Merrifield
Affiliation:
School of Physics & Astronomy, University of Nottingham, UK
N. R. Napolitano
Affiliation:
Osservatorio di Capodimonte, Naples, Italy
E. Noordermeer
Affiliation:
School of Physics & Astronomy, University of Nottingham, UK
A. J. Romanowsky
Affiliation:
Departamento de Física, Universidad de Concepsión, Casilla 160-C, Concepción, Chile
*
†email: [email protected]
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Abstract

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NMAGIC is a parallel implementation of our made-to-measure (χ2M2M) algorithm for constructing N-particle models of stellar systems from observational data, which extends earlier ideas by Syer & Tremaine (1996). The χ2M2M algorithm properly accounts for observational errors, is flexible, and can be applied to various systems and geometries. We show its ability to reproduce the internal dynamics of an oblate isotropic rotator model and report on the modeling of the dark matter (DM) halo of NGC 3379 combining SAURON and PN.S kinematic data. The χ2M2M algorithm is practical, reliable and can be applied to various dynamical systems without symmetry restrictions. We conclude that χ2M2M holds great promise for unraveling the internal dynamics of bulges.

Keywords

galaxies: elliptical and lenticularcDgalaxies: kinematics and dynamicsgalaxies: individual: NGC 3379methods: numericalmethods: n-body simulations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 27 - 30
Copyright
Copyright © International Astronomical Union 2008

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