Sgr A* 中应力边缘附近的调制X射线激发
Modulated X-ray Emissivity near the Stress Edge in Sgr A*
摘要：
Sgr A* 被认为是银河系中心一个~3.6E6 Msun超大质量黑洞的辐射表现。它的毫米/亚毫米光谱和它的耀斑发射在红外和X射线波长内可以产生内十史瓦西半径的热，磁化开普勒流。在这个区域产生的光变曲线可能表现出准周期性的变化。我们提出了射线跟踪模拟，以确定一般相对论调制X射线光度预期从磁耦合到磁盘的其余部分等离子体，因为它螺旋向内下方的最内部的稳定的圆形轨道朝向“应力边缘”的情况下，史瓦西度规。由此产生的光变曲线表现出类似于最近从Sgr A* 的X射线耀斑期间观察到的调制。
英文摘要：
Sgr A* is thought to be the radiative manifestation of a ~3.6E6 Msun supermassive black hole at the Galactic center. Its mm/sub-mm spectrum and its flare emission at IR and X-ray wavelengths may be produced within the inner ten Schwarzschild radii of a hot, magnetized Keplerian flow. The lightcurve produced in this region may exhibit quasi-periodic variability. We present ray-tracing simulations to determine the general-relativistically modulated X-ray luminosity expected from plasma coupled magnetically to the rest of the disk as it spirals inwards below the innermost stable circular orbit towards the "stress edge" in the case of a Schwarzschild metric. The resulting lightcurve exhibits a modulation similar to that observed during a recent X-ray flare from Sgr A*.
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