We derive cosmological limits on two-component hot dark matter consisting of neutrinos and axions. We restrict the large-scale structure data to the safely linear regime, excluding the Lyman-alpha forest. We derive Bayesian credible regions in the two-parameter space consisting of m_a and sum(m_nu). Marginalizing over sum(m_nu) provides m_a<1.02 eV (95% CL). In the absence of axions the same data and methods give sum(m_nu)< 0.63 eV (95% CL).
@article{arxiv.0808.0814,
title = {Axion hot dark matter bounds},
author = {G. Raffelt and S. Hannestad and A. Mirizzi and Y. Y. Y. Wong},
journal= {arXiv preprint arXiv:0808.0814},
year = {2008}
}
Comments
Contribution to Proc. 4th Patras Workshop on Axions, WIMPs and WISPs (18-21 June 2008, DESY)