2015/10/31 by Antonella Garzilli, Alexey Boyarsky, Oleg Ruchayskiy · 1 citation
Physics and Astronomy · #astro-ph.CO #astro-ph.GA #hep-ph
paper · pdf · doi:10.1016/j.physletb.2017.08.022
Accepted in Physics Letters B
arxiv created 2017/09/15 · arxiv updated 2017/09/18
We re-analyse high redshift and high resolution Lyman-α forest spectra considered in (Viel et al 2013), seeking to constrain the properties of warm dark matter particles. Compared to this previous work, we consider a wider range of thermal histories of the intergalactic medium. We find that both warm and cold dark matter models can explain the cut-off observed in the flux power spectra of high-resolution observations equally well. This implies, however, very different thermal histories and underlying re-ionisation models. We discuss how to remove this degeneracy.