X-RAY-EMISSION FROM 4U-2129+47 (=V1727-CYGNI) IN QUIESCENCE

被引:12
作者
GARCIA, MR
机构
[1] Harvard-Smithsonian Ctr. Astrophys., Cambridge, MA 02139
关键词
ACCRETION; ACCRETION DISKS; BINARIES; ECLIPSING; STARS; INDIVIDUAL; (V1727; CYGNI); X-RAYS;
D O I
10.1086/174823
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Observations with the ROSAT HRI allow detection of weak X-ray flux from the low-mass X-ray binary (LMXB) 4U 2129+47 during its current quiescent state. The quiescent luminosity is similar to that seen in several other quiescent LMXBs containing neutron stars. The quiescent X-ray light curve may not show the eclipse seen when the source was in its high state, which would indicate that the enhanced vertical structure present in the disk during the high state has collapsed. This in turn provides support for the idea that the vertical structure in LMXB accretion disks is a consequence of high X-ray luminosity. A comparison of the absorption of low-energy X-rays due to the interstellar medium (determined from Einstein IPC observations) and the optical extinction does not rule out the triple system hypothesis.
引用
收藏
页码:407 / 410
页数:4
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