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A Self-Consistent Dynamical Model for the COBE Observed Galactic Bar and Its Application to Microlensing

Published online by Cambridge University Press:  12 April 2016

HongSheng Zhao
HongSheng Zhao*
Affiliation:
Max-Planck-Institute für Astrophysik, 85740 Garching, Germany

Abstract

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A self-consistent stellar dynamical model for the Galactic bar is constructed from about 500 numerically computed orbits with an extension of the Schwarzschild technique. The model fits the COBE found asymmetric boxy light distribution and the observed stellar kinematics of the bulge. The model potential is also consistent with the non-circular motions of the HI and CO velocity maps of the inner Galaxy. We also use the stellar bar model to construct an N-body model to study stability and a microlensing map towards the bulge, which can account for the observed optical depth and the event duration by the MACHO and OGLE collaborations. The technique used here can be applied to interpret light and velocity data of external bulges/bars and galactic nuclei.

Type
Part IX. The Galaxy as a Barred Spiral
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 549 - 553
Copyright
Copyright © Astronomical Society of the Pacific 1996

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