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Dynamically stable models for galaxies

Published online by Cambridge University Press:  11 March 2020

Jörg Dabringhausen
Affiliation:
Astronomicky ustav, Universita Karlova, V Holesovickach 2, 180 00 Prague, Czech Republic email: subr@sirrah.troja.mff.cuni.cz
Ladislav Šubr
Affiliation:
Astronomicky ustav, Universita Karlova, V Holesovickach 2, 180 00 Prague, Czech Republic email: subr@sirrah.troja.mff.cuni.cz
Anja Feldmeier-Krause
Affiliation:
Department of Astronomy and Astrophysics, University of Chicago, 5640 S. Ellis Ave, Chicago, IL60637, United States of America email: afeldmei@uchicago.edu
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Abstract

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A popular approach to model galaxies is Schwarzschild’s method. For this method, a grid of sample orbits of stars in an external potential is calculated, and a model for the stellar system is obtained through attributing specific weights to the orbits in a superposition of them. The models created with Schwarzschild’s method can fit many observed properties of the modeled stellar system with high precision. However, systems that are stationary as Schwarzschild models may therefore exhibit a strong time evolution if they are translated into more realistic self-gravitating models. The issue is highlighted with the Galactic center as an example.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

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