活动星系核喷流与吸积盘辐射的相关性研究

The Disc-jet Connection in Black-hole Accretion Disc

对于稳态的、几何薄光学厚的标准盘,在考虑到喷流存在时吸积物质角动量的损失的情况下,根据黑洞吸积盘系统的能量守恒与角动量守恒,把吸积盘和喷流作为一个整体,推导出了标准薄盘的辐射通量的解析表达式。研究结果表明,存在喷流时吸积盘的辐射通量会明显降低;同时吸积盘的辐射通量F随着黑洞的自转参数a*的增大而明显增大,黑洞自转a*=0.998时的通量值比a*=0时的值高出3个数量级;该结论能很好地被天文观测所拟合。

For a steady,thin Kerplerian disc around a Kerr black hole,the analytical expressions for the energy fluxes released by the Kerr disc were derived by using the conservation laws of angular momentum and energy in the case of the coexistence of the jet and the Kerr disc,when the angular momentum loss owing to jet was taken into account.It is shown that the energy fluxes F becomes lower,and increases monotonically with the increasing BH spin for a given accretion rate.In addition,we find that the energy fluxes F in the case of is a*=0.998 about three order of magnitude greater than its value in the case of a*=0.The results are consistent with the observation of astronomy.