出典:Wikipedia
出典:『Wikipedia』 (2011/07/28 05:41 UTC 版)
A hypercompact stellar system (HCSS) is a dense cluster of stars around a supermassive black hole that has been ejected from the centre of its host galaxy. Stars that are close to the black hole at the time of the ejection will remain bound to the black hole after it leaves the galaxy, forming the HCSS.