Probing the precession of the inner accretion disk in cygnus X-1

被引：6
|
作者：
Torres, DF
Romero, GE
Barcons, X
Lu, YJ
机构：
[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[2] IAR, RA-1894 Villa Elisa, Argentina
[3] CSIC, UC, Inst Fis Cantabria, Santander 39005, Spain
[4] Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2005年 / 626卷 / 02期
关键词：
X-rays : binaries; X-rays : individual (Cygnus X-1);
D O I：
10.1086/430125
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that changes in the orientation of the inner accretion disk of Cyg X-1 affect the shape of the broad Fe K alpha emission line emitted from this object, in such a way that eV-level spectral resolution observations ( such as those that will be carried out by the Astro-E2 satellite) can be used to analyze the dynamics of the disk. We present here a potential diagnostic tool supported by numerical simulations by which a few observations of Cyg X-1, separated in time, can determine whether its accretion disk actually precesses, and if so, determine its period and precession angle. This approach could also be used for similar studies in other microquasar systems.
引用
收藏
页码：1015 / 1019
页数：5
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