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

双星系统和活动星系核中的黑洞周围都有一个吸积盘。在SS433和布拉格中观测到的天体物理喷流被认为是从吸积盘中喷出的。最近，对SS433喷流的X射线观测取得了重要进展。因此，我们以SS433喷气发动机为研究对象，对SS433喷气发动机的结构和排放进行了研究。本文的主要研究结果如下：(1)推导出了确定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，射流的光学厚度不同，而在射流的外部，离子和电子的温度相同，射流很薄.(2)射流在中心物体附近是圆锥形的，而在外部，射流截面随着距离中心物体的距离而增大.(3)声速点位于~9×10~(-7)cm的距离处.(4)由于喷流内部光学厚度很大，辐射压力也被排除为可能的加速机制。(5)我们发现的喷流溶液预测了伽马射线发射，其总量为~10^&lt；没有观测到这样的伽马射线，表明喷流的内部被一个厚的吸积盘遮挡住了。

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.