标题： 快速旋转的Kerr-(反)德西特黑洞周围的非单调轨道速度分布 显示英文标题

标题： Non-monotonic orbital velocity profiles around rapidly rotating Kerr-(anti-)de Sitter black holes

摘要： 最近已经证明，在局部非旋转参考系中观察到的围绕Kerr黑洞赤道平面上的轨道速度分布表现出非单调的径向行为。我们在这里表明，如果将Kerr真空推广到Kerr-de Sitter或Kerr-anti-de Sitter度规，这种轨道速度的意外最小值-最大值特征仍然存在。这是具有非零宇宙学常数的Kerr时空中的一个新的广义相对论效应。假设轨道速度的分布已知，这种效应会限制时空参数。 显示英文摘要

摘要： It has been recently demonstrated that the orbital velocity profile around Kerr black holes in the equatorial plane as observed in the locally non-rotating frame exhibits a non-monotonic radial behaviour. We show here that this unexpected minimum-maximum feature of the orbital velocity remains if the Kerr vacuum is generalized to the Kerr-de Sitter or Kerr-anti-de Sitter metric. This is a new general relativity effect in Kerr spacetimes with non-vanishing cosmological constant. Assuming that the profile of the orbital velocity is known, this effect constrains the spacetime parameters.