史瓦西黑洞可以戴上标量假发
Schwarzschild black holes can wear scalar wigs
摘要：
我们研究了史瓦西黑洞周围的大质量标量场的演化，并找到了可以存活任意长时间的配置，只要黑洞或标量场的质量足够小。特别地，超大质量黑洞周围的超轻标量场暗物质和原始黑洞周围的类轴子标量场都可以在宇宙学时间内存活。此外，这些结果是相当通用的，在这个意义上，相当任意的初始数据演变，在后期，作为这些长期存在的配置的组合。
英文摘要：
We study the evolution of a massive scalar field surrounding a Schwarzschild black hole and find configurations that can survive for arbitrarily long times, provided the black hole or the scalar field mass is small enough. In particular, both ultra-light scalar field dark matter around supermassive black holes and axion-like scalar fields around primordial black holes can survive for cosmological times. Moreover, these results are quite generic, in the sense that fairly arbitrary initial data evolves, at late times, as a combination of those long-lived configurations.
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