Variable low-mass X-ray binaries in early-type galaxies

被引：0
|
作者：
Sivakoff, Gregory R. [1 ]
Jordan, Andres [2 ]
Juett, Adrienne M. [3 ]
Sarazin, Craig L. [4 ]
Irwin, Jimmy A. [5 ]
机构：
[1] Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA
[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[4] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
[5] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
来源：
POPULATION EXPLOSION: THE NATURE AND EVOLUTION OF X-RAY BINARIES IN DIVERSE ENVIRONMENTS | 2008年 / 1010卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
As the Chandra X-ray Observatory mission matures, increasing numbers of nearby galaxies axe being observed multiple times, sampling the variability of extragalactic X-ray binaries on timescales extending from seconds to years. We present results on luminous low-mass X-ray binaries from several early-type galaxies. We show that instantaneous LMXB luminosity functions of early-type galaxies do not significantly change between observations; a relatively low fraction of sources are strongly variable on less than or similar to 5yr timescales. We discuss the implications that a relatively small number of transient LMXBs are being discovered in early-type galaxies.
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页码：308 / +
页数：2
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