UvA-DARE ( Digital Academic Repository ) A model-independent analysis of the variability of GRS 1915 + 105
UvA-DARE ( Digital Academic Repository ) A model-independent analysis of the variability of GRS 1915 + 105
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DOI：
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发表时间：
2000-01
影响因子：
6.5
通讯作者：
T. Belloni;M. Klein-Wolt;M. M. éndez-M.;M. Klis;J. Paradijs
中科院分区：
文献类型：
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作者：
T. Belloni;M. Klein-Wolt;M. M. éndez-M.;M. Klis;J. Paradijs
本文分析了1996-1997年期间用Rossi X射线定时探测器（RXTE）对微类星体GRS 1915+105的163个观测结果。对于每一次观察，我们都制作了光变曲线和颜色-颜色图。我们根据它们的计数率和颜色特征将观察结果分为12个单独的类别。从这些类的分析中，我们减少了源的可变性，三个基本状态之间的过渡：硬状态对应的吸积盘的最里面的部分的不可观测性，和两个软状态与一个完全可观测的磁盘。这两个软态代表了吸积盘的不同温度，与吸积率的不同局部值有关。这些状态之间的转换可能非常快。源在这三种状态之间移动，遵循某些模式并避免其他模式，从而产生相对较大但数量有限的可变性类。这些结果是第一步，对连接的属性，这个特殊的源与标准的黑洞系统和吸积盘模型。
We analyzed 163 observations of the microquasar GRS 1915+105 made with the Rossi X-ray Timing Explorer (RXTE) in the period 1996-1997. For each observation, we produced light curves and color-color diagrams. We classified the observations in 12 separate classes, based on their count rate and color characteristics. From the analysis of these classes, we reduced the variability of the source to transitions between three basic states: a hard state corresponding to the non-observability of the innermost parts of the accretion disk, and two softer states with a fully observable disk. These two soft states represent different temperatures of the accretion disk, related to different local values of the accretion rate. The transitions between these states can be extremely fast. The source moves between these three states following certain patterns and avoiding others, giving rise to a relatively large but limited number of variability classes. These results are the first step towards a linking of the properties of this exceptional source with standard black-hole systems and with accretion disk models.