Near-Horizon Solution for DGP Perturbations

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dc.creatorSawicki, Ignacy
dc.creatorSong, Yong-Seon
dc.creatorHu, Wayne
dc.date2006-06-13
dc.date2007-01-26
dc.date.accessioned2026-07-07T10:23:11Z
dc.date.available2026-07-07T10:23:11Z
dc.descriptionWe develop a scaling ansatz for the master equation in Dvali, Gabadadze, Porrati cosmologies, which allows us to solve the equations of motion for perturbations off the brane during periods when the on-brane evolution is scale-free. This allows us to understand the behavior of the gravitational potentials outside the horizon at high redshifts and close to the horizon today. We confirm that the results of Koyama and Maartens are valid at scales relevant for observations such as galaxy-ISW correlation. At larger scales, there is an additional suppression of the potential which reduces the growth rate even further and would strengthen the ISW effect.
dc.description11 pages, 10 figures, changes to introduction reflect version accepted by PRD
dc.identifierhttps://arxiv.org/abs/astro-ph/0606285
dc.identifierhttp://arxiv.org/abs/astro-ph/0606285
dc.identifierPhys.Rev.D75:064002,2007
dc.identifierdoi:10.1103/PhysRevD.75.064002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175737
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleNear-Horizon Solution for DGP Perturbations
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