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Axion dark matter-induced echo of supernova remnants

Author(s)
Sun, Yitian; Schutz, Katelin; Nambrath, Anjali; Leung, Calvin; Masui, Kiyoshi
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Abstract
Axions are a theoretically promising dark matter (DM) candidate. In the presence of radiation from bright astrophysical sources at radio frequencies, nonrelativistic DM axions can undergo stimulated decay to two nearly back-to-back photons, meaning that bright sources of radio waves will have a counterimage ("gegenschein") in nearly the exact opposite spatial direction. The counterimage will be spectrally distinct from backgrounds, taking the form of a narrow radio line centered at $\nu = m_a/4\pi$ with a width determined by Doppler broadening in the DM halo, $\Delta \nu/\nu \sim 10^{-3}$. In this work, we show that the axion decay-induced echoes of supernova remnants may be bright enough to be detectable. Their non-detection may be able to set the strongest limits to date on axion DM in the $\sim 1-10 \, \mu$eV mass range where there are gaps in coverage from existing experiments.
Date issued
2022-03-09
URI
https://hdl.handle.net/1721.1/142143
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Center for Theoretical Physics; MIT Kavli Institute for Astrophysics and Space Research
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Sun, Yitian, Schutz, Katelin, Nambrath, Anjali, Leung, Calvin and Masui, Kiyoshi. 2022. "Axion dark matter-induced echo of supernova remnants." Physical Review D, 105 (6).
Version: Final published version

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