超高速星的搜寻与研究

Research and Exploration of Hypervelocity Stars

超高速星是现在已知的银河系中速度最快的星体,它能够摆脱银河系的束缚.由于超高速星特殊的产生机制,使得它成为探索银河系银心内部超大质量黑洞的重要工具,近些年来人们陆续发现了许多颗超高速星以及候选体,这些发现将对研究银心内部超大质量黑洞、银河系引力势和银河系暗物质晕有重要意义.本文对超高速星的理论和观测的国内外研究情况进行了介绍.

Hypervelocity star is now the fastest known stars in the galaxy,which can escape from galaxy.The special generation mechanism of hypervelocity star makes it an important tool to research the supermassive black hole in the center of the galaxy.In recent years,people have discovered more than 20 hypervelocity stars as well as many candidates of hypervelocitystars,and those findings will influence the research of gravitational potential and dark matter halos of milk way.This paper will briefly introduce the theory of hypervelocity star,main models of hypervelocity star and the research progress of it.