Updated Bounds on Axion-Like Particle Dark Matter with the Optical MUSE-Faint Survey
Abstract
Bounds are derived on the axion-like particle (ALP) to two-photon coupling in the mass range 2.65 − 5.27 eV. The bounds are obtained by searching for the signal from ALP decay in the Multi Unit Spectroscopic Explorer (MUSE) observations of five dwarf spheroidal galaxies, under the assumption that ALPs constitute the dark matter component of the haloes. These bounds are of the same order and improve on the robustness of those of Regis et al., (2021), and currently represent the strongest bounds within the considered mass range.
- Publication:
-
Annalen der Physik
- Pub Date:
- January 2024
- DOI:
- 10.1002/andp.202300042
- arXiv:
- arXiv:2310.01996
- Bibcode:
- 2024AnP...53600042T
- Keywords:
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- Astrophysics - Cosmology and Nongalactic Astrophysics;
- High Energy Physics - Phenomenology
- E-Print:
- Invited publication in Annalen der Physik