Dark Matter Halos with Cores from Hierarchical Structure Formation

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dc.creatorStrigari, Louis E.
dc.creatorKaplinghat, Manoj
dc.creatorBullock, James S.
dc.date2006-06-12
dc.date2007-03-26
dc.date.accessioned2026-07-07T11:04:03Z
dc.date.available2026-07-07T11:04:03Z
dc.descriptionWe show that dark matter emerging from late decays (z < 1000) produces a linear power spectrum identical to that of Cold Dark Matter (CDM) on all observationally relavant scales (> 0.1 Mpc), and simultaneously generates observable constant-density cores in small dark matter halos. We refer to this class of models as meta-Cold Dark Matter (mCDM), because it is born with non-relativistic velocities from the decays of cold thermal relics. The constant-density cores are a result of the low phase-space density of mCDM at birth. Warm dark matter cannot produce similar size phase-space limited cores without saturating the Ly-alpha power spectrum bounds. Dark matter dominated galaxy rotation curves and stellar velocity dispersion profiles may provide the best means to discriminate between mCDM and CDM. mCDM candidates are motivated by the particle spectrum of supersymmetric and extra dimensional extensions to the standard model of particle physics.
dc.description5 pages, 1 figure. Matches PRD published version
dc.identifierhttps://arxiv.org/abs/astro-ph/0606281
dc.identifierhttp://arxiv.org/abs/astro-ph/0606281
dc.identifierPhys.Rev.D75:061303,2007
dc.identifierdoi:10.1103/PhysRevD.75.061303
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188759
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDark Matter Halos with Cores from Hierarchical Structure Formation
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