论文标题
质量，旋转和倾斜度的黑洞闪烁特征
Black Hole Glimmer Signatures of Mass, Spin, and Inclination
论文作者
论文摘要
黑洞附近的重力镜头足够强大，光线可以多次圈出事件范围。在单个事件中以多个方向发射的光子可能是由于对等离子体的局部脉冲加热，对遥远的观察者采取多个路径。在Kerr几何形状中，每条路径都与独特的光线旅行时间和图像平面中不同的到达位置相关联，从而产生黑洞闪烁。这种到达时间和位置的顺序独特地编码了黑洞的质量和自旋，并且可以从结合的光子轨道的特性来理解。我们提供了对Kerr微光的几何动机处理，并通过数值评估它，以使简单的热点模型表明可以在有限分辨率的观察中测量微光。我们讨论了潜在的测量方法以及对Kerr假设检验的影响。
Gravitational lensing near a black hole is strong enough that light rays can circle the event horizon multiple times. Photons emitted in multiple directions at a single event, perhaps because of localized, impulsive heating of accreting plasma, take multiple paths to a distant observer. In the Kerr geometry, each path is associated with a distinct light travel time and a distinct arrival location in the image plane, producing black hole glimmer. This sequence of arrival times and locations uniquely encodes the mass and spin of the black hole and can be understood in terms of properties of bound photon orbits. We provide a geometrically motivated treatment of Kerr glimmer and evaluate it numerically for simple hotspot models to show that glimmer can be measured in a finite-resolution observation. We discuss potential measurement methods and implications for tests of the Kerr hypothesis.
