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 Reference~\cite{Regis}, and currently represent the strongest bounds within the considered mass range.

Invited publication in Annalen der Physik

References in corpus (10)

• Revisiting the bound on axion-photon coupling from Globular Clusters
• The MUSE Hubble Ultra Deep Field Survey: I. Survey description, data reduction and source detection
• Stellar Velocities in the Carina, Fornax, Sculptor and Sextans dSph Galaxies: Data from the Magellan/MMFS Survey
• Redefining the Axion Window
• A Telescope Search for Decaying Relic Axions
• Searching for Light in the Darkness: Bounds on ALP Dark Matter with the optical MUSE-Faint survey
• Probing the Blue Axion with Cosmic Optical Background Anisotropies
• Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly
• The MUSE-Faint survey. II. The dark matter-density profile of the ultra-faint dwarf galaxy Eridanus 2
• The MUSE-Faint survey. III. No large dark-matter cores and no significant tidal stripping in ultra-faint dwarf galaxies