论文标题
光学厚，非本地，不均匀的固定喷气模型，用于从Blazars发出的高能辐射：应用到MRK 421
Optically thick, nonlocal, inhomogeneous, stationary jet model for high-energy radiation from blazars: Application to Mrk 421
论文作者
论文摘要
有越来越多的观察证据表明，在无线电大质量黑洞（SMBH）的直接附近产生了无线电高活性银河核中极高的能量伽马射线，靠近相对主义射流的底部。在某些Blazars的情况下，射流轴和观察者的视线之间的角度小于射流的角度。因此，生产到接近SMBH的伽马射线必须在到达观察者之前在延长射流的非热辐射中传播。这种伽马射线发射可以在延长的喷射辐射中被强烈吸收，从而产生第二代电子旋律对，该电子峰值对主要通过同步加速器过程失去能量。我们表明，这种先进的不均匀射流模型可以解释非频率状态下BL LAC对象MRK 421的多波长光谱，以了解射流和SMBH的合理参数。此外，我们认为，从二级电子词素对发出的同步加速器发射，这是由于吸收γ射线的吸收而导致的，这些伽马射线是在射流辐射中接近SMBH的，与MRK 421中观察到的凹形硬X射线发射是一致的。
There is an increasing number of observational evidence that very high energy gamma-rays in radio-loud active galactic nuclei are produced in the direct vicinity of a supermassive black hole (SMBH), close to the base of a relativistic jet. In the case of some blazars, the angle between the jet axis and the observer's line of sight is smaller than the angular extent of the jet. Gamma-rays that are produced close to SMBH therefore have to propagate in the nonthermal radiation of the extended jet before reaching the observer. This gamma-ray emission can be strongly absorbed in the extended jet radiation, producing a second generation of electron-positron pairs that loses energy mainly via the synchrotron process. We show that this advanced inhomogeneous jet model can explain the multiwavelength spectrum of the BL Lac object Mrk 421 in a nonflaring state for reasonable parameters of the jet and the SMBH. Moreover, we argue that synchrotron emission from the secondary electron-positron pairs, which appear as a result of absorption of gamma-rays that are produced close to the SMBH within the jet radiation, is consistent with the concave hard X-ray emission observed from Mrk 421.
