Polarized images of synchrotron radiations in curved spacetime

Zezhou Hu; Yehui Hou; Haopeng Yan; Minyong Guo; Bin Chen

doi:10.1140/epjc/s10052-022-11144-9

2022 Impact factor 4.4

Particles and Fields

Open Access

Eur. Phys. J. C (2022) 82: 1166
https://doi.org/10.1140/epjc/s10052-022-11144-9

Regular Article - Theoretical Physics

Polarized images of synchrotron radiations in curved spacetime

Zezhou Hu¹, Yehui Hou¹, Haopeng Yan², Minyong Guo³^d and Bin Chen¹^,2^,4

¹ Department of Physics, Peking University, No. 5 Yiheyuan Rd, 100871, Beijing, People’s Republic of China
² Center for High Energy Physics, Peking University, No. 5 Yiheyuan Rd, 100871, Beijing, People’s Republic of China
³ Department of Physics, Beijing Normal University, 100875, Beijing, People’s Republic of China
⁴ Collaborative Innovation Center of Quantum Matter, No. 5 Yiheyuan Rd, 100871, Beijing, People’s Republic of China

^d minyongguo@bnu.edu.cn

Received: 8 September 2022
Accepted: 18 December 2022
Published online: 24 December 2022

Abstract

In this work, we derive two formulas encoding the polarization direction and luminosity of synchrotron radiations from the moving electrons in curved spacetime under the geometric optics approximation. As an application, we further study the polarized images of synchrotron radiations from electron sources in Schwarzschild black hole spacetime with a vertical and uniform magnetic field. In particular, by focusing on the circular orbits of electrons on the equatorial plane, we show the polarized images of the synchrotron radiations from these orbits for different observational angles and discuss the variations of the polarization directions concerning the angles.

© The Author(s) 2022

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