Constraints on light decaying dark matter candidates from 16 yr of INTEGRAL/SPI observations
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- April 2023
- DOI:
- arXiv:
- arXiv:2209.06299
- Bibcode:
- 2023MNRAS.520.4167C
- Keywords:
-
- astroparticle physics;
- dark matter;
- gamma-rays: general;
- High Energy Physics - Phenomenology;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 6 pages, 5 figures. Version accepted for publication in MNRAS. Code and supplementary material available at https://zenodo.org/record/7984451