论文标题
通过光圆极化和事件范围探测轴
Probing Axions via Light Circular Polarization and Event Horizon Telescope
论文作者
论文摘要
根据事件地平线地平线望远镜（EHT）的最新极化测量，讨论了轴突状颗粒对三孔黑洞（SMBH）周围光线极化的影响。我们研究了由于与光子和SMBH的磁场相互作用而导致极化的不同来源。这些可以修改发射光的线性和圆形极化参数。我们已经表明，可以通过从背景磁场的光子散射中产生明显的圆极化，轴是壳颗粒。这可以进一步限制超轻轴状颗粒的参数空间及其与光子的耦合。圆极化的未来精确测量可以探测SMBH近乎附近的超轻轴的特征。
The impact of axion-like particles on the light polarization around the horizon of suppermassive black hole (SMBH) is discussed in the light of the latest polarization measurement of the Event Horizon Telescope (EHT). We investigate different sources of the polarization due to axion interaction with photons and the magnetic field of SMBH. These can modify the linear and circular polarization parameters of the emitted light. We have shown that a significant circular polarization can be produced via the photon scattering from the background magnetic field with axions as off-shell particles. This can further constrain the parameter space of ultralight axion-like particles and their couplings with photons. The future precise measurements of circular polarization can probe the features of ultralight axions in the near vicinity of SMBH.
