How cold is cold dark matter? Small scales constraints from the flux power spectrum of the high-redshift Lyman-alpha forest

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dc.creatorViel, M.
dc.creatorBecker, G. D.
dc.creatorBolton, J. S.
dc.creatorHaehnelt, M. G.
dc.creatorRauch, M.
dc.creatorSargent, W. L. W.
dc.date2007-09-02
dc.date2008-01-31
dc.date.accessioned2026-07-07T11:19:02Z
dc.date.available2026-07-07T11:19:02Z
dc.descriptionWe present constraints on the mass of warm dark matter (WDM) particles derived from the Lyman-alpha flux power spectrum of 55 high- resolution HIRES spectra at 2.0 < z < 6.4. From the HIRES spectra, we obtain a lower limit of mwdm > 1.2 keV 2 sigma if the WDM consists of early decoupled thermal relics and mwdm > 5.6 keV (2 sigma) for sterile neutrinos. Adding the Sloan Digital Sky Survey Lyman-alpha flux power spectrum, we get mwdm > 4 keV and mwdm > 28 keV (2 sigma) for thermal relics and sterile neutrinos. These results improve previous constraints by a factor two.
dc.descriptionSome issues clarified (especially resolution related). Conclusions unchanged. Accepted version by PRL
dc.identifierhttps://arxiv.org/abs/0709.0131
dc.identifierhttp://arxiv.org/abs/0709.0131
dc.identifierPhys.Rev.Lett.100:041304,2008
dc.identifierdoi:10.1103/PhysRevLett.100.041304
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193550
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleHow cold is cold dark matter? Small scales constraints from the flux power spectrum of the high-redshift Lyman-alpha forest
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