Probing Axions with Event Horizon Telescope Polarimetric Measurements
Probing Axions with Event Horizon Telescope Polarimetric Measurements
复制标题
使用视界望远镜偏振测量探测轴子
DOI：
10.1103/physrevlett.124.061102
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发表时间：
2020
影响因子：
8.6
通讯作者：
Zhao Yue
中科院分区：
文献类型：
--
作者：
Chen Yifan;Shu Jing;Xue Xiao;Yuan Qiang;Zhao Yue
事件视界望远镜对超大质量黑洞的偏振成像具有高空间分辨率，可以用来探测超轻玻色子粒子的存在，如轴子。这样的粒子可以通过超辐射机制聚集在旋转的黑洞周围，形成轴子云。当线偏振光子从地平线附近的吸积盘发射时，由于通过轴子背景时的双折射效应，它们的位置角发生了振荡。特别是，超大质量黑洞(SGR)的观测可以探测质量在[]附近、衰变常数为[]的轴子的无量纲轴子-光子耦合，这是对其他轴子测量的补充。
With high spatial resolution, polarimetric imaging of a supermassive black hole, likeor Sgr, by the Event Horizon Telescope can be used to probe the existence of ultralight bosonic particles, such as axions. Such particles can accumulate around a rotating black hole through the superradiance mechanism, forming an axion cloud. When linearly polarized photons are emitted from an accretion disk near the horizon, their position angles oscillate due to the birefringent effect when traveling through the axion background. In particular, the observations of supermassive black holes(Sgr) can probe the dimensionless axion-photon couplingfor axions with mass around[] and decay constant, which is complimentary to other axion measurements.