https://doi.org/10.1140/epjc/s10052-022-10173-8
Regular Article - Theoretical Physics
Dark fluxes from accreting black holes through several mechanisms
1
School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 310024, Hangzhou, China
2
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
3
School of Physical Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China
4
School of Physics, Beijing Institute of Technology, Haidian District, 100081, Beijing, China
5
Department of Physics, INFN Sapienza University of Rome, 00185, Rome, Italy
6
Nevada Center for Astrophysics, University of Nevada, 89154, Las Vegas, NV, USA
7
Department of Physics and Astronomy, University of Nevada, 89154, Las Vegas, NV, USA
8
National Astronomy Observatories, Chinese Academy of Science, 100101, Beijing, China
9
International Center for Theoretical Physics Asia-Pacific, Beijing/Hangzhou, China
10
Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Sakyo-ku, 606-8502, Kyoto, Japan
Received:
5
October
2021
Accepted:
26
February
2022
Published online:
21
March
2022
We discuss the possibility that accreting black hole systems can be sources for dark matter flux through several different mechanisms. We firstly discuss two types of systems‘: coronal thermal plasmas around supermassive black holes in active galactic nuclei (AGNs), and accretion disks of stellar-mass X-ray black hole binaries (BHBs). We explore how these black hole systems may produce keV light dark matter fluxes and find that the dark fluxes from those sources might be too weak to account for the current XENON1T excess. On the other hand, black holes can be good accelerators to accrete and boost heavy dark matter particles. If considering collisions or dark electromagnetism, those particles can then escape and reach the benchmark speed of 0.1c at the detector. We also extend the black hole mass region to primordial black holes (PBHs) and discuss the possibility of contributing to keV light dark flux via superradiance of PBHs.
© The Author(s) 2022
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