矮星系球体和银河潮汐场
天体物理学
2007-05-23 v1
摘要
银河系被围绕着九个或更多的矮星系球体(satellite dwarf spheroidal, dSph) satellite galaxies,这些星系主要由暗物质组成。本文概述了研究表明,最初为球形且无暗物质的低质量卫星星系,若处于巨大的银河暗 corona 中,经过长时间演化后,可演化为非球形、具有非各向同性速度分散张量且不处于virial平衡状态的残骸,但在足够长的时间内仍足够亮,可能被误认为是暗物质主导的dSph星系。
引用
@article{arxiv.astro-ph/9612028,
title = {Dwarf Spheroidal Satellite Galaxies and the Galactic Tidal Field},
author = {Pavel Kroupa},
journal= {arXiv preprint arXiv:astro-ph/9612028},
year = {2007}
}
备注
4 pages of plain TeX, Invited talk held at the 18th Meeting of the Graduierten-Kolleg: The Magellanic System and other dwarf galaxies -- Investigations of small galaxies, November 13/14/15 1996, Bad Honnef, organised by U.Klein (Bonn)