arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0811.2703astro-ph
收藏

GRS 1915+105:SPI/INTEGRAL的高能洞察力

GRS 1915+105 : High-energy Insights with SPI/INTEGRAL

Robert Droulans, Elisabeth Jourdain

摘要:

我们报告了两年的INTEGRAL/SPI监测银河系微类星体GRS 1915+105的结果。从2004年9月至2006年5月,该源已被观察了20次,长时间(约100 ks)曝光。我们提出了一个SPI数据的分析,并专注于高能量(> 20 keV)输出的源的描述。我们发现GRS 1915+105的20 - 500 keV光谱发射是束缚在两个态之间的。这些高能态似乎与源的时间行为无关,这表明日冕等离子体的宏观特征与吸积流的可变性之间没有直接联系。所有的光谱都很好地拟合的热康普顿化组件加上一个额外的高能量幂律。这证实了黑洞周围存在热电子和非热电子。

英文摘要:

We report on results of two years of INTEGRAL/SPI monitoring of the Galactic microquasar GRS 1915+105. From September 2004 to May 2006, the source has been observed twenty times with long (approx 100 ks) exposures. We present an analysis of the SPI data and focus on the description of the high-energy (> 20 keV) output of the source. We found that the 20 - 500 keV spectral emission of GRS 1915+105 was bound between two states. It seems that these high-energy states are not correlated with the temporal behavior of the source, suggesting that there is no direct link between the macroscopic characteristics of the coronal plasma and the the variability of the accretion flow. All spectra are well fitted by a thermal comptonization component plus an extra high-energy powerlaw. This confirms the presence of thermal and non-thermal electrons around the black hole.

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。

↑