Axion dark matter-induced echo of supernova remnants
Name
PhysRevD.105.063007.pdf
Description
Published version
Size
1.01 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Sun, Yitian
Schutz, Katelin
Nambrath, Anjali
Leung, Calvin
Masui, Kiyoshi
Date Issued
March 9, 2022
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
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Center for Theoretical Physics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1103/physrevd.105.063007
