文章基本信息

标题：Satellite Galaxies’ Drag on Field Stars in the Milky Way
本地全文：下载
作者：Xilong Liang ; Jifeng Liu ; Jingkun Zhao 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2022
卷号：164
期号：2
页码：1-6
DOI：10.3847/1538-3881/ac76c5
语种：English
出版社：American Institute of Physics
摘要：With Gaia EDR3 data, velocity dispersion of Milky Way field stars around satellite galaxies has been investigated. We have fitted velocity dispersion against the distance to the satellite galaxy and found the gradient of velocity dispersion is related to the mass of the satellite galaxy. With order-of-magnitude approximations, a linear correlation has been fitted between the mass of the satellite galaxy and the gradient of velocity dispersion caused by its gravitational drag. Though our result is an observational qualitative result, it shows a better relation could be obtained with more observations in the future.