有限厚度盘状星系中物质的分布

Chinese Astronomy Pub Date : 1979-09-01 DOI:10.1016/0146-6364(79)90018-5

Peng Qiu-he, Huang Ke-liang, Huang Jie-hao, Li Xiao-qing, Su Hong-jun

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引用次数: 3

摘要

对于密度沿z方向呈指数衰减的轴对称星系，研究了其投影表面密度与旋转曲线的关系。恒星的特殊运动被忽略了。得到了无限薄圆盘星系图姆尔公式的修正形式。我们发现，在厚度有限的情况下，物质更向中心集中;我们银河系中心部分的预测表面密度比图姆模型给出的要高9%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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On the distribution of matter in disk-shaped galaxies of finite thickness

For an axisymmetric galaxy with an exponential density decrease along the z-direction, the relation between the projected surface density and the rotation curve is investigated. The peculiar motions of stars are neglected. Revised forms of Toomre's formulae for an infinitely thin disk galaxy are obtained. It is found that with a finite thickness, matter is more concentrated towards the centre; the projected surface density in the central part of our Galaxy comes out about 9% higher than is given by Toomre's model.

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