Cosmological measurements are affected by the energy density of both active and sterile massive neutrinos. We extend here a recent analysis of current cosmological data to non minimal cosmologies. Several possible scenarios are examined: a constant w \neq -1 dark energy equation of state, a non flat universe, a time varying dark energy component and coupled dark matter dark energy universes or modified gravity scenarios. When considering cosmological data only, (3+2) massive neutrino models with ~0.5 eV sterile species are allowed at 95% CL. This scenario has been shown to reconcile reactor, LSND and MiniBooNE positive signals with null results from other searches. Big Bang Nucleosynthesis bounds could compromise the viability of (3+2) models if the two sterile species are fully thermalized states at decoupling.
@article{arxiv.1112.4661,
title = {Constraints on massive sterile plus active neutrino species in non minimal cosmologies},
author = {Elena Giusarma and Maria Archidiacono and Roland de Putter and Alessandro Melchiorri and Olga Mena},
journal= {arXiv preprint arXiv:1112.4661},
year = {2013}
}