On multipolar analytical potentials for galaxies

被引：4
|
作者：
Vogt, D [1 ]
Letelier, PS
机构：
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
[2] Univ Estadual Campinas, IMECC, Dept Matemat Aplicada, BR-13083970 Campinas, SP, Brazil
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2005年 / 57卷 / 06期
关键词：
galaxies : kinematics and dynamics; galaxies : structure;
D O I：
10.1093/pasj/57.6.871
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present analytical potential-density pairs in three dimensions for the gravitational field of galaxies, obtained by thickening the multipolar expansion up to the quadrupole term. These may be interpreted as generalizations of the Miyamoto and Nagai potential-density pairs. With a suitable restriction on the possible values of the multipole moments, the density distributions are positive and monotone decreasing functions of the radial and axial coordinates.
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页码：871 / 875
页数：5
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