Matter density perturbations in interacting quintessence models

Simple item page
dc.creatorOlivares, G.
dc.creatorAtrio-Barandela, F.
dc.creatorPavon, D.
dc.date2006-07-26
dc.date.accessioned2026-07-07T11:42:34Z
dc.date.available2026-07-07T11:42:34Z
dc.descriptionModels with dark energy decaying into dark matter have been proposed to solve the coincidence problem in cosmology. We study the effect of such coupling in the matter power spectrum. Due to the interaction, the growth of matter density perturbations during the radiation dominated regime is slower compared to non-interacting models with the same ratio of dark matter to dark energy today. This effect introduces a damping on the power spectrum at small scales proportional to the strength of the interaction and similar to the effect generated by ultrarelativistic neutrinos. The interaction also shifts matter--radiation equality to larger scales. We compare the matter power spectrum of interacting quintessence models with the measurments of 2dFGRS. We particularize our study to models that during radiation domination have a constant dark matter to dark energy ratio.
dc.description11 pages, 4 figures, accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/astro-ph/0607604
dc.identifierhttp://arxiv.org/abs/astro-ph/0607604
dc.identifierPhys.Rev.D74:043521,2006
dc.identifierdoi:10.1103/PhysRevD.74.043521
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200929
dc.subjectAstrophysics
dc.titleMatter density perturbations in interacting quintessence models
dc.typetext

Files

Collections

arXiv