论文标题
kerr黑洞周围的积聚驱动标量头发的生长
Growth of accretion driven scalar hair around Kerr black holes
论文作者
论文摘要
围绕紧凑型物体的标量字段对于重力和暗物质模型的标量张量理论感兴趣，例如大量标量，例如轴。我们研究具有非琐碎渐近边界条件的Kerr黑洞周围标量场的行为 - 非零密度和非零角动量。从初始的径向均匀配置开始，积聚标量云，随着时间的推移，该配置逐渐渐近地属于已知的固定配置。我们研究了不同参数的云生长，包括黑洞自旋，标量场质量以及标量场密度和远离黑洞的角动量。我们表征了云中质量和角动量的瞬时生长，以及黑洞周围标量的空间曲线，并将完全非线性模拟的结果与分析性扰动扩展相关联。我们还强调了这些积聚云产生单色引力波信号的潜力 - 类似于超级云的信号，尽管幅度明显弱。
Scalar fields around compact objects are of interest for scalar-tensor theories of gravity and dark matter models consisting of a massive scalar, e.g. axions. We study the behaviour of a scalar field around a Kerr black hole with non trivial asymptotic boundary conditions - both non zero density and non zero angular momentum. Starting from an initial radially homogeneous configuration, a scalar cloud is accreted, which asymptotes to known stationary configurations over time. We study the cloud growth for different parameters including black hole spin, scalar field mass, and the scalar field density and angular momentum far from the black hole. We characterise the transient growth of the mass and angular momentum in the cloud, and the spatial profile of the scalar around the black hole, and relate the results of fully non-linear simulations to an analytic perturbative expansion. We also highlight the potential for these accreted clouds to create monochromatic gravitational wave signals - similar to the signals from superradiant clouds, although significantly weaker in amplitude.
