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Dark coupling and gauge invariance

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dc.contributor.author	Gavela, María Belén
dc.contributor.author	López Honórez, Laura
dc.contributor.author	Mena Requejo, Olga
dc.contributor.author	Rigolin, Stefano
dc.date.accessioned	2014-09-11T08:05:50Z
dc.date.available	2014-09-11T08:05:50Z
dc.date.issued	2010
dc.identifier.citation	Gavela, M. B. López Honórez, L. Mena Requejo, Olga Rigolin, S. 2010 Dark coupling and gauge invariance Journal Of Cosmology And Astroparticle Physics 10 11 044
dc.identifier.uri	http://hdl.handle.net/10550/37723
dc.description.abstract	We study a coupled dark energy-dark matter model in which the energy-momentum exchange is proportional to the Hubble expansion rate. The inclusion of its perturbation is required by gauge invariance. We derive the linear perturbation equations for the gauge invariant energy density contrast and velocity of the coupled fluids, and we determine the initial conditions. The latter turn out to be adiabatic for dark energy, when assuming adiabatic initial conditions for all the standard fluids. We perform a full Monte Carlo Markov Chain likelihood analysis of the model, using WMAP 7-year data.
dc.language.iso	eng
dc.relation.ispartof	Journal Of Cosmology And Astroparticle Physics, 2010, vol. 10, num. 11, p. 044
dc.subject	Física
dc.subject	Astrofísica
dc.title	Dark coupling and gauge invariance
dc.type	journal article	es_ES
dc.date.updated	2014-09-11T08:05:50Z
dc.identifier.doi	10.1088/1475-7516/2010/11/044
dc.identifier.idgrec	097554
dc.rights.accessRights	open access	es_ES