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Schwarzschild modeling of barred galaxies

Published online by Cambridge University Press:  14 May 2020

Eugene Vasiliev Open the ORCID record for Eugene Vasiliev [Opens in a new window]  and
Monica Valluri Open the ORCID record for Monica Valluri [Opens in a new window]
Eugene Vasiliev
Affiliation:
Institute of Astronomy, University of Cambridge, UK Lebedev Physical Institute, Moscow, Russia Department of Astronomy, University of Michigan, Ann Arbor, MI, USA email: [email protected]
Monica Valluri
Affiliation:
Department of Astronomy, University of Michigan, Ann Arbor, MI, USA email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

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We review the Schwarzschild orbit-superposition approach and present a new implementation of this method, which can deal with a large class of systems, including rotating barred disk galaxies. We discuss two conceptual problems in this field: the intrinsic degeneracy of determining the potential from line-of-sight kinematics, and the non-uniqueness of deprojection and related biases in potential inference, especially acute for triaxial bars. When applied to mock datasets with known 3d shape, our method correctly recovers the pattern speed and other potential parameters. However, more work is needed to systematically address these two problems for real observational datasets.

Keywords

galaxies: structuregalaxies: kinematics and dynamicsgalaxies: nuclei
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S353: Galactic Dynamics in the Era of Large Surveys , June 2019 , pp. 176 - 183
Copyright
© International Astronomical Union 2020

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