Spectrum of a jet-emitting disc: application to the microquasar XTE J1118+480

Spectrum of a jet-emitting disc: application to the microquasar XTE J1118+480
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射流发射盘的光谱:在微类星体 XTE J1118 480 上的应用

DOI:
10.1093/mnras/stt1367
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发表时间:
2013-07
影响因子:
4.8
通讯作者:
Fu-Guo Xie
Fu-Guo Xie
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jian-Fu Zhang;Fu-Guo Xie

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在磁化吸积喷出结构的框架下,分析了能量平衡性质,研究了黑洞X射线瞬变的喷射盘(JED)模型的谱能量分布。考虑了不同的辐射过程,即同步辐射、韧致辐射和它们的康普顿化,以及来自外部薄盘的辐射的外部康普顿化。考虑到这些冷却项,我们自洽地求解了热平衡方程,得到了三个解,其中冷解和热解是稳定的。随后,我们研究了这两个稳定解的理论自洽场。我们发现热JED模型可以自然地解释银河系微类星体在硬态下的光谱。作为例子,我们将该模型应用到XTE J1118+480的案例中。
Under the framework of the magnetized accretion ejection structures, we analyse the energy balance properties, and study the spectral energy distributions (SEDs) of the jet-emitting disc (JED) model for black hole X-ray transients. Various radiative processes are considered, i.e. synchrotron, bremsstrahlung, and their Comptonizations, and external Comptonization of radiation from the outer thin disc. With these cooling terms taken into account, we solve the thermal equilibrium equation self-consistently and find three solutions, of which the cold and the hot solutions are stable. Subsequently, we investigate the theoretical SEDs for these two stable solutions. We find the hot JED model can naturally explain the spectra of the Galactic microquasars in their hard states. As an example, we apply this model to the case of XTE J1118+480.
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