Studies on the spectral states of black hole X-ray stars

双星系统中的黑洞和活动星系核被吸积盘包围。在SS 433和brazers观测到的天体物理喷流被认为是从吸积盘喷射出来的。最近，x射线观测在SS 433喷气机上取得了重要进展。因此，我们以SS 433射流为研究对象，对SS 433射流的结构和发射特性进行了研究。本研究的主要结果总结如下：(1)我们可以推导出确定沿射流温度分布的解析解。在射流内部，离子和电子的温度不同，射流具有光学厚度，而在射流外部，两个温度相同，射流具有光学厚度。(2)射流在中心物体附近呈锥形，而在外围，射流截面随着离中心物体的距离而增大。(3)声波点位于~ 9×10^7 cm的距离，排除了气体压力作为射流加速的可能机制。(4)由于射流内部具有光学厚度，因此也排除了辐射压力作为加速机制的可能性。(5)我们发现的喷流溶液预测了伽马射线发射，达到~ 10^<39> erg/s。没有观测到这样的伽马射线表明喷流的内部被厚厚的吸积盘屏蔽。

Black holes in the binary systems and active galactic nuclei are surrounded with an accretion disk. Astrophysical jets, observed in SS 433 and brazers, are considered to be ejected from the accretion disk. Recently, X-ray observations are yielding an important progress on the SS 433 jets. Hence, we focused on the SS 433 jets and studied the structure and emission of the SS 433 jets. The main results of this study are summarized as follows.(1) We can derive the analytical solutions that determine the temperature distribution along the jet. In the inner part of a jet the ion and electron temepratures are different and the jet is optically thick, whereas in the outer part two temperatures are the same and the jet is optically thin.(2) The jet is conical near the central object, while in the outer part the jet cross section increases with distance from the central object.(3) The sonic point is located at the distance of〜9×10^7 cm, which excludes the gas pressure as a possible mechanism for jet acceleration.(4) The radiation pressure is also ruled out as a possible acceleration mechanism since the inner part of the jet is optically thick.(5) The jet solution we found predicts a gamma ray emission, which amounts to〜10^<39> erg/s. No observation of such gamma rays indicates that the inner part of the jet is screened by a thick accretion disk.