Linear Cosmological Structure Limits on Warm Dark Matter

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dc.creatorAbazajian, Kevork
dc.date2005-12-29
dc.date2006-03-10
dc.date.accessioned2026-07-07T06:49:15Z
dc.date.available2026-07-07T06:49:15Z
dc.descriptionI consider constraints from observations on a cutoff scale in clustering due to free streaming of the dark matter in a warm dark matter cosmological model with a cosmological constant. The limits are derived in the framework of a sterile neutrino warm dark matter universe, but can be applied to gravitinos and other models with small scale suppression in the linear matter power spectrum. With freedom in all cosmological parameters including the free streaming scale of the sterile neutrino dark matter, limits are derived using observations of the fluctuations in the cosmic microwave background, the 3D clustering of galaxies and 1D clustering of gas in the Lyman-alpha (Ly-alpha) forest in the Sloan Digital Sky Survey (SDSS), as well as the Ly-alpha forest in high-resolution spectroscopic observations. In the most conservative case, using only the SDSS main-galaxy 3D power-spectrum shape, the limit is m_s > 0.11 keV; including the SDSS Ly-alpha forest, this limit improves to m_s > 1.7 keV. More stringent constraints may be placed from the inferred matter power spectrum from high-resolution Ly-alpha forest observations, which has significant systematic uncertainties; in this case, the limit improves to m_s > 3.0 keV (all at 95% CL).
dc.description6 pages, 4 figures; v2: matches PRD version, with note added regarding astro-ph/0602430
dc.identifierhttps://arxiv.org/abs/astro-ph/0512631
dc.identifierhttp://arxiv.org/abs/astro-ph/0512631
dc.identifierPhys.Rev. D73 (2006) 063513
dc.identifierdoi:10.1103/PhysRevD.73.063513
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/104268
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLinear Cosmological Structure Limits on Warm Dark Matter
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