Probing Axions with Event Horizon Telescope Polarimetric Measurements.,Physical Review Letters

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Probing Axions with Event Horizon Telescope Polarimetric Measurements.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-02-14 , DOI: 10.1103/physrevlett.124.061102
Yifan Chen _{1,

2} , Jing Shu _{1,

3,

4,

5,

6} , Xiao Xue _{1,

3} , Qiang Yuan _{6,

7,

8} , Yue Zhao ₉

Affiliation

CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Laboratoire de Physique Théorique et Hautes Energies (LPTHE), UMR 7589, Sorbonne Université et CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France.
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
CAS Center for Excellence in Particle Physics, Beijing 100049, People's Republic of China.
School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China.
Center for High Energy Physics, Peking University, Beijing 100871, People's Republic of China.
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China.
School of Astronomy and Space Science, University of Science and Technology of China, 14 Hefei 230026, People's Republic of China.
Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA.

With high spatial resolution, polarimetric imaging of a supermassive black hole, like M87^{⋆} or Sgr A^{⋆}, 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 M87^{⋆} (Sgr A^{⋆}) can probe the dimensionless axion-photon coupling c=2πg_{aγ}f_{a} for axions with mass around O(10^{-20}) eV [O(10^{-17}) eV] and decay constant f_{a}

中文翻译：

使用Event Horizon望远镜极化测量来探测轴。

具有高空间分辨率，事件地平线望远镜可以对超大质量黑洞（如M87 ^ {⋆}或Sgr A ^ {⋆}）进行极化成像，以探测超轻玻色子（例如轴）的存在。这样的粒子可以通过超辐射机制聚集在旋转的黑洞周围，形成轴云。当线偏振光子从地平线附近的吸积盘发射时，由于穿过轴心本底时的双折射效应，其位置角会振荡。特别是，超大质量黑洞M87 ^ {⋆}（Sgr A ^ {⋆}）的观测结果可以探测无量纲轴-光子耦合c =2πg_{aγ} f_ {a}的质量约为O（10 ^ { -20}）eV [O（10 ^ {-17}）eV]和衰减常数f_ {a}

更新日期：2020-02-14

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