METAL-POOR HYPERVELOCITY STAR CANDIDATES FROM THE SLOAN DIGITAL SKY SURVEY
METAL-POOR HYPERVELOCITY STAR CANDIDATES FROM THE SLOAN DIGITAL SKY SURVEY
复制标题
斯隆数字天空调查中的贫金属超高速恒星候选者
DOI:
10.1088/2041-8205/744/2/l24
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发表时间:
2011-12
影响因子:
7.9
通讯作者:
Zuo, Fang
中科院分区:
文献类型:
--
作者:
Li, Yinbi;Luo, Ali;Zhao, Gang;Lu, Youjun;Ren, Juanjuan;Zuo, Fang
Hypervelocity stars are believed to be ejected out from the Galactic center (GC) through dynamical interactions of (binary) stars with the central massive black hole(s). In this Letter, we report 13 metal-poor F-type hypervelocity star candidates selected from 370,000 stars of the data release 7 of the Sloan Digital Sky Survey. With a detailed analysis of the kinematics of these stars, we find that seven of them were likely ejected from the GC or the Galactic disk, four neither originated from the GC nor the Galactic disk, and the other two were possibly ejected from either the Galactic disk or other regions. Those candidates that unlikely originated from the GC or the Galactic disk may be explained by other mechanisms, like the tidal disruption of the Milky Way's dwarf galaxies in the Galactic potential, or the gravitational interactions with a massive black hole at the center of M31 or M32.
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DOI:
10.1086/506139
发表时间:
2006-03
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Merritt
通讯作者:
D. Merritt
影响因子:
64.8
作者:
J. Hills
通讯作者:
J. Hills
DOI:
10.1088/0004-637x/690/1/795
发表时间:
2007-12
期刊:
The Astrophysical Journal
影响因子:
--
作者:
H. Perets
通讯作者:
H. Perets
DOI:
--
发表时间:
2002
期刊:
--
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1111/j.1365-2966.2010.16253.x
发表时间:
2009-12
影响因子:
4.8
作者:
R. Schönrich;J. Binney;W. Dehnen
通讯作者:
R. Schönrich;J. Binney;W. Dehnen