Probing the string axiverse by gravitational waves from Cygnus X-1
Probing the string axiverse by gravitational waves from Cygnus X-1
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DOI：
10.1093/ptep/ptv067
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
H. Yoshino;H. Kodama
中科院分区：
文献类型：
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作者：
H. Yoshino;H. Kodama
在轴宇宙方案中，一个大质量标量场（弦轴子）通过超辐射不稳定性在旋转黑洞周围形成云，并发射出连续的引力波。我们研究的弦轴子参数，可以从GW观测的约束。如果在LIGO数据中对天鹅座X-1的GW进行有针对性的搜索时没有检测到信号，则衰变常数$f_a$必须小于质量范围$1.1\times 10^{-12}\mathrm{eV}<\mu<2.5\times 10^{-12}\mathrm{eV}$的大统一理论尺度。还讨论了来自不可见孤立BH的约束。
In the axiverse scenario, a massive scalar field (string axion) forms a cloud around a rotating black hole (BH) by superradiant instability and emits continuous gravitational waves (GWs). We examine constraints on the string axion parameters that can be obtained from GW observations. If no signal is detected in a targeted search for GWs from Cygnus X-1 in the LIGO data, the decay constant $f_a$ must be smaller than the GUT scale in the mass range $1.1\times 10^{-12}\mathrm{eV}<\mu<2.5\times 10^{-12}\mathrm{eV}$. Constraints from invisible isolated BHs are also discussed.