Does low surface brightness mean low density?

被引：78

作者：

deBlok, WJG ^{[1
]}

McGaugh, SS ^{[1
]}

机构：

[1] CARNEGIE INST WASHINGTON,DEPT TERR MAGNETISM,WASHINGTON,DC 20015

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 469卷 / 02期

关键词：

dark matter; galaxies; fundamental parameters; individual; (NGC; 2403; UGC; 128); kinematics and dynamics; spiral; structure;

D O I：

10.1086/310266

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compare the dynamical properties of two galaxies at identical positions on the Tully-Fisher relation, but with different surface brightnesses. We find that the low surface brightness galaxy UGC 128 has a higher mass-to-light ratio, and yet has lower mass densities than the high surface brightness galaxy NGC 2403. This is true for the gas surface density, the stellar surface density, and the total mass density.

引用

页码：L89 / L92

页数：4

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