Neutrino Signatures on the High Transmission Regions of the Lyman-alpha Forest

Details Neutrino Signatures on the High Transmission Regions of the Lyman-alpha Forest Neutrino Signatures on the High Transmission Regions of the Lyman-alpha Forest

2011-06-13

arxiv.org/abs/1106.2543v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 4 figures

Scientific paper

We quantify the influence of massive neutrinos on the statistics of low density regions in the intergalactic medium as probed by the Lyman-alpha forest at redshifts z=2.2-4. Based on mock quasar spectra from hydrodynamic simulations with cold dark matter, baryons and neutrinos, we find that the probability distribution of weak Lyman-alpha absorption features, as sampled by Lyman-alpha flux regions at high transmissivity, is strongly affected by the presence of massive neutrinos, when the amplitude of the matter power spectrum is fixed on large scales from measurements of the microwave background anisotropies. The application of the derived statistic to observed quasar spectra would provide a new sensitive measure of neutrino masses.

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