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>Mass and Angular Momentum of Black Holes: An Overlooked Effect of General Relativity Applied to the Galactic Center Black Hole Sgr A*
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Mass and Angular Momentum of Black Holes: An Overlooked Effect of General Relativity Applied to the Galactic Center Black Hole Sgr A*
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机译:黑洞的质量和角动量:应用到银河系中心黑洞Sgr A *的广义相对论的一个被忽略的效应
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摘要
I report the discovery of a new effect of General Relativity which is important to understand very rapidly rotating (Kerr) black holes. The orbital velocity of a test particle is no longer a monotonic function of the orbit radius when the spin of the black hole is >0.9953, but displays a local minimum-maximum structure for radii smaller than 1.8 gravitational radii. There the rate of change of the orbital velocity per radius unit equals the radial epicyclic frequency and is exactly one third of the polar epicyclic frequency, suggesting a 3:1 resonant oscillatory motion of the particle. If associated with the observed quasi-periods - including the most recent 2005/2006 data - the mass of the supermassive black hole Sgr A* in the centre of the our Galaxy is determined to 3.3 million solar masses and the spin is 0.99616.
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机译:我报告发现了广义相对论的新效应,这对于理解非常快速旋转的(Kerr)黑洞非常重要。当黑洞的自旋> 0.9953时,测试粒子的轨道速度不再是轨道半径的单调函数,而是显示半径小于1.8引力半径的局部最小-最大结构。在那里,每个半径单位的轨道速度变化率等于径向周转频率,并且正好是极性周转频率的三分之一,这表明粒子的共振振动为3:1。如果与观察到的准周期(包括最新的2005/2006数据)相关联,我们银河系中心的超大质量黑洞Sgr A *的质量被确定为330万太阳质量,自旋为0.99616。
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