Constraints on light decaying dark matter candidates from 16 yr of INTEGRAL/SPI observations. Issue 3 (14th February 2023)

• Record Type: Journal Article
• Authors: Calore, F; Dekker, A; Serpico, P D; Siegert, T
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 520:Issue 3(2023)
• Page Start: 4167
• Page End: 4172
• Publication Date: 2023-02-14
• Subjects: astroparticle physics -- dark matter -- gamma-rays: general; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stad457
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We apply the recently developed analysis of 16 yr of INTEGRAL/SPI data including a dark matter spatial template to derive bounds on dark matter candidates lighter than weakly interacting massive particles (like sterile neutrinos or axion-like particles) decaying into line or continuum electromagnetic final state channels. The bounds obtained are the strongest to date for dark matter masses between ∼60 keV and ∼16 MeV experiencing two-body decays producing photon lines.