AN AXISYMMETRICAL DISTRIBUTION FUNCTION FOR THE GALACTIC BULGE

被引：23

作者：

KUIJKEN, K

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

[2] UNIV BASQUE COUNTRY,DEPT THEORET PHYS,BILBAO,SPAIN

来源：

ASTROPHYSICAL JOURNAL | 1995年 / 446卷 / 01期

关键词：

CELESTIAL MECHANICS; STELLAR DYNAMICS; GALAXY; HALO; KINEMATICS AND DYNAMICS; STRUCTURE; METHODS; NUMERICAL;

D O I：

10.1086/175778

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe a method for parameterizing two-integral distribution functions, based on triangular tessellations of the integral plane. We apply the method to the axisymmetric isotropic rotator model for the Galactic bulge of Kent (1992), and compute the projected distributions of radial velocities and proper motions expected for this model in order to allow a detailed comparison with observations. This type of analysis yields complete model predictions, significantly stronger than the velocity moments that can be calculated from the Jeans equations. In spite of strong evidence from surface photometry and from study of the gas kinematics that the Galactic bulge is not axisymmetric, the stellar kinematics in Baade's window art very similar to those of an isotropic oblate rotator.

引用

页码：194 / 202

页数：9

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