Searching for sterile neutrino with X-ray intensity mapping
Abstract
The cosmological X-ray emission associated to the possible radiative decay of sterile neutrinos is composed by a collection of lines at different energies. For a given mass, each line corresponds to a given redshift. In this work, we cross correlate such line emission with catalogs of galaxies tracing the dark matter distribution at different redshifts. We derive observational prospects by correlating the X-ray sky that will be probed by the eROSITA and Athena missions with current and near future photometric and spectroscopic galaxy surveys. A relevant and unexplored fraction of the parameter space of sterile neutrinos can be probed by this technique.
- Publication:
-
Journal of Cosmology and Astroparticle Physics
- Pub Date:
- March 2020
- DOI:
- 10.1088/1475-7516/2020/03/001
- arXiv:
- arXiv:1911.09120
- Bibcode:
- 2020JCAP...03..001C
- Keywords:
-
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- High Energy Physics - Phenomenology
- E-Print:
- Typo corrected in Eq.4