期刊
ASTROPHYSICAL JOURNAL
卷 609, 期 2, 页码 652-666出版社
UNIV CHICAGO PRESS
DOI: 10.1086/421338
关键词
dark matter; galaxies : kinematics and dynamics; galaxies : spiral
The mass discrepancy in disk galaxies is shown to be well correlated with acceleration, increasing systematically with decreasing acceleration below a critical scale a(0) approximate to 3700 km(2) s(-2) kpc(-1) = 1.2 x 10(-10) m s(-2). For each galaxy, there is an optimal choice of stellar mass-to-light ratio that minimizes the scatter in this mass discrepancy-acceleration relation. The same mass-to-light ratios also minimize the scatter in the baryonic Tully-Fisher relation and are in excellent agreement with the expectations of stellar population synthesis. Once the disk mass is determined in this fashion, the dark matter distribution is specified. The circular velocity attributable to the dark matter can be expressed as a simple equation that depends only on the observed distribution of baryonic mass. It is a challenge to understand how this very fine-tuned coupling between mass and light comes about.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据