Mass Accretion onto a Black Hole

黑洞的质量吸积

基本信息

批准号：
03640251
负责人：
HOSHI Reiun
金额：
$ 1.28万
依托单位：
Rikkyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640251/
关键词：
Low Maxx R-Ray Binaries X-Ray Transients Black Hole Neutron Star Accretion Disk ブラックホール型X線新星低質量X線連星 X線照射低質量X線星ブラックホ-ル型X線新星

项目摘要

We have studied the mass accretion onto a black hole, comparing the X-ray transients(black hole candidates) with the low mass X-ray binaries(LMXB). The main results obtained in this study are summarized as follows.1. There are two components in the X-ray spectra of both X-ray transients and low mass X-ray binaries. One of the two components is common in both X-ray sources and is well fitted by the model spectrum expected from the accretion disk. The time variability of this components is very low in both sources. These evidence indicates that the accretion disks with similar properties exist around both black holes and neutron stars.2. another component is fitted by a power low spectrum in X-ray transients, while by a blackbody spectrum in LMXBs. This component may be emitted from the region close to the black hole and the neutron star.3. The second component in both sources exhibits a large time variation independentry of the disk component. This evidence indicates that there exist another channel for mass accretion onto the central star besides the ordinary accretion disk(optically thick and geometriaclly thin disk).We propose that the optically thick and geometrically thin disk is sandwiched in the optically thin and geometrically thick disk, which givers rise to the intense time variation.

我们已经研究了质量积聚到黑洞上，将X射线瞬变（黑洞候选）与低质量X射线二进制（LMXB）进行了比较。本研究中获得的主要结果总结如下1。 X射线瞬变的X射线光谱和低质量X射线二进制文件中有两个组件。这两个组件之一在两个X射线源中都是常见的，并且与积聚磁盘预期的模型频谱非常合适。在两个来源中，该组件的时间变异性都非常低。这些证据表明，在黑洞和中子星周围都存在具有相似特性的增生磁盘2。另一个组件由X射线瞬变的功率低光谱拟合，而LMXBS中的黑体频谱则拟合。该组件可以从靠近黑洞和中子星的区域发射。3。两个来源中的第二个组成部分都表现出很大的时间变化磁盘分量的独立性。该证据表明，除了普通的积聚磁盘（光学厚和几何细胞薄磁盘）外，还有另一个质量积聚通道。我们建议将光学厚和几何薄磁盘夹在光学薄和几何厚的磁盘中，从而使磁盘夹在磁盘上，从而使该磁盘上升到强烈的时间变化。