Are sterile neutrinos consistent with clusters, the CMB and MOND?

TL;DR

This paper proposes that a single sterile neutrino with a mass of about 11 eV can simultaneously explain galaxy cluster dark matter, fit the CMB power spectrum, and align with MOND, offering an alternative to standard cosmology.

Contribution

It introduces a model where a sterile neutrino accounts for dark matter in clusters and fits cosmological observations while maintaining a flat universe similar to LCDM.

Findings

Sterile neutrino with 11 eV mass explains cluster dark matter.

Model fits CMB angular power spectrum.

Universe remains flat with standard components.

Abstract

If a single sterile neutrino exists such that $m_{\nu_s}\sim11eV$, it can serendipitously solve all outstanding issues of the Modified Newtonian Dynamics. With it one can explain the dark matter of galaxy clusters without influencing individual galaxies, match the angular power spectrum of the cosmic microwave background and potentially fit the matter power spectrum. This model is flat with $\Omega_{\nu_s}\sim0.23$ and the usual baryonic and dark energy components, thus the Universe has the same expansion history as the $\lcdm$ model and only differs at the galactic scale where the Modified Dynamics outperforms $\lcdm$ significantly.