arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1904.09112astro-ph.HE
收藏

用INTEGRAL对天鹅座黑洞X-1的长期谱研究

Long-term spectral study of the black hole Cygnus X-1 using INTEGRAL

F. Cangemi, T. Beuchert, T. Siegert, V. Grinberg, J. Wilms, J. Rodriguez, I. Kreykenbohm, P. Laurent, K. Pottschmidt

摘要:

我们利用IBIS和SPI的联合能力对微类星体Cygnus X-1进行了20- 2000 keV的状态分辨分析。在LHS和HSS中,谱分析显示除了在20- 400 keV范围内的标准的类康普顿连续谱之外,还存在400 keV以上的高能尾。我们研究了硬X射线辐射的偏振特性,以及这种高能量尾部的偏振。偏振检测在LHS协议与以前的工作。我们发现LHS偏振随时间的潜在变化,并且在HSS中没有偏振检测。

英文摘要:

We utilize the joint capabilities of IBIS and SPI to perform a state-resolved 20--2000\,keV analysis of the microquasar Cygnus X-1. In both LHS and HSS, the spectral analysis reveals the presence of a high-energy tail above 400\,keV in addition to a standard, Compton-like continuum in the 20--400\,keV range. We study the polarisation properties of the hard X-ray radiation, as well as of the polarisation of this high-energy tail. Polarisation is detected in the LHS in agreement with previous work. We find potential variations of the LHS polarisation with time and no polarisation detection in the HSS.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑