Sgr A* 超大质量黑洞半脱离伴星的轨道和性质
The orbit and nature of the semi-detached stellar companion of Sgr A* super-massive blackhole
摘要：
在之前的三篇论文中，我指出，迄今为止探测到的所有Sgr A* X射线耀斑的时间中点序列都具有一种称为起搏器规律性的统计趋势。这意味着X射线耀斑在周期P_X=0.1032天=149分钟的时间轴上的周期网格的子集的时间点附近被更频繁地检测到。探测物体近红外（NIR）耀斑峰值的一系列时间也由起搏器调节，其周期为P_IR=0.028天=41分钟。在这里，我表明，记录的近红外耀斑的时间的中点的系列也由一个起搏器的周期P_∞ =0.039天=56分钟。在之前的论文中发现的两个起搏器被解释为一颗恒星的信号，该恒星围绕着Sgr A* 的黑洞旋转，其轨道的平均半径为黑洞的史瓦西半径约3.2，这里校正为约3.13。第三起搏点周期的发现与所提出的旋转星模型一致。在这里，我提出的具体轨道的恒星以及一个似是而非的描述其恒星旋转。该模型还暗示，这颗恒星具有不寻常的内部结构。我表明，发现的引力合作的热点运动的距离黑洞是非常少的史瓦西半径的顺序，它可以很好地理解的背景下，旋转的恒星模型。
英文摘要：
In three previous papers I showed that the series of the midpoints of the times of all the X-ray flares of Sgr A* that have been detected so far harbor a statistical trend termed pacemaker regularity. This means that X-ray flares are detected more frequently around time points that are a subset of a periodic grid on the time axis of period P_X=0.1032 day=149 minutes. The series of the times of detection of the peaks of near IR (NIR) flares of the object are also regulated by a pacemaker with a period of P_IR=0.028 day=41 minutes. Here, I show that the series of the midpoints of the times of recorded NIR flares are also regulated by a pacemaker of the period P_IRM=0.039 day=56 minutes. The two pacemakers found in the previous papers were interpreted as signals of a star that revolves around the black hole of Sgr A* in orbit with a mean radius of ~3.2 Schwarzschild radii of the black hole, here corrected to ~3.13. The finding of the period of the third pacemaker is consistent with the suggested revolving star model. Here, I present the specific orbit of the star as well as a plausible description of its sidereal rotation. The model also implies that the star has an unusual internal structure. I show that the discovery of the GRAVITY collaboration of the motion of hotspots at distances from the black hole that are of the order of very few Schwarzschild radii of it may well be understood within the context of the revolving star model.
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