Searching for Sterile Neutrino with X-ray Intensity Mapping. (arXiv:1911.09120v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Caputo_A/0/1/0/all/0/1">A.Caputo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Regis_M/0/1/0/all/0/1">M. Regis</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Taoso_M/0/1/0/all/0/1">M. Taoso</a>
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.
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.
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