3C 120的中心引擎结构：逆行黑洞或再填充吸积盘的证据
The Central Engine Structure of 3C120: Evidence for a Retrograde Black Hole or a Refilling Accretion Disk
摘要：
宽线射电星系3C 120是一个强大的X射线和射电辐射源，包括超光速喷流。我们报告了我们对2006年拍摄的160 k朱雀数据的重新分析，之前由Kataoka等人（2007）进行了检查。光谱拟合的XIS和HXD/PIN数据在0.7-45千电子伏的范围内揭示了一个定义明确的铁K线复杂的一个狭窄的Ka核心和相对论性扩大的功能一致的发射从内部区域的吸积盘。此外，圆盘的内部区域似乎被截断，其内半径r_in = 11.7^{+3.5}_{-5.2} r_g。如果我们假设荧光铁线特征终止于最内部稳定圆轨道（ISCO），我们在90%的置信水平下测量到a < -0.1的黑洞自旋。在99%的置信水平下，可以排除快速旋转的黑洞（a > 0.8）。或者，圆盘可以在快速钻孔的ISCO之外被截断。最令人信服的情况是，在这些观测之前，盘的内部区域可能被灾难性的不稳定性破坏/弹出。
英文摘要：
The broad-line radio galaxy 3C120 is a powerful source of both X-ray and radio emission including superluminal jet outflows. We report on our reanalysis of 160 ks of Suzaku data taken in 2006, previously examined by Kataoka et al. (2007). Spectral fits to the XIS and HXD/PIN data over a range of 0.7-45 keV reveal a well-defined iron K line complex with a narrow Ka core and relativistically broadened features consistent with emission from the inner regions of the accretion disk. Furthermore, the inner region of the disk appears to be truncated with an inner radius of r_in = 11.7^{+3.5}_{-5.2} r_g. If we assume that fluorescent iron line features terminate at the inner-most stable circular orbit (ISCO), we measure a black hole spin of a < -0.1 at a 90% confidence level. A rapidly spinning prograde black hole (a > 0.8) can be ruled out at the 99% confidence level. Alternatively, the disk may be truncated well outside of the ISCO of a rapid prograde hole. The most compelling scenario is the possibility that the inner regions of the disk were destroyed/ejected by catastrophic instabilities just prior to the time these observations were made.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
