Probing axions via light circular polarization and event horizon telescope

被引：11
作者：
Shakeri, Soroush [1 ,2 ]
Hajkarim, Fazlollah [3 ,4 ,5 ]
机构：
[1] Isfahan Univ Technol, Dept Phys, Esfahan 8415683111, Iran
[2] ICRANet, Piazza Repubbl 10, I-65122 Pescara, Italy
[3] Univ Padua, Dipartimento Fis & Astron, Via Marzolo 8, I-35131 Padua, Italy
[4] Ist Nazl Fis Nucl INFN, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy
[5] Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2023年 / 04期
关键词：
axions; dark matter theory; massive black holes; MAGNETIC-FIELDS; PROPAGATION; PHYSICS; PHOTON;
D O I：
10.1088/1475-7516/2023/04/017
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The impact of axion-like particles on the light polarization around the horizon of supermassive black hole (SMBH) is discussed in the light of the latest polarization mea-surement 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 con-strain 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.
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页数：28
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