SN1A data and the CMB of Modified Curvature at short and long distances

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dc.creatorBastero-Gil, M.
dc.creatorMersini, L.
dc.date2001-07-14
dc.date2001-09-13
dc.date.accessioned2026-07-07T10:31:07Z
dc.date.available2026-07-07T10:31:07Z
dc.descriptionThe SN1a data, although inconclusive, when combined with other observations makes a strong case that our universe is presently dominated by dark energy. We investigate the possibility that large distance modifications of the curvature of the universe would perhaps offer an alternative explanation of the observation. Our calculations indicate that a universe made up of no dark energy but instead, with a modified curvature at large scales, is not scale-invariant, therefore quite likely it is ruled out by the CMB observations. The sensitivity of the CMB spectrum is checked for the whole range of mode modifications of large or short distance physics. The spectrum is robust against modifications of short-distance physics and the UV cutoff when: the initial state is the adiabatic vacuum, and the inflationary background space is de Sitter.
dc.description13 pages, 2 eps figures, typos corrected, references added; to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/astro-ph/0107256
dc.identifierhttp://arxiv.org/abs/astro-ph/0107256
dc.identifierPhys.Rev.D65:023502,2002
dc.identifierdoi:10.1103/PhysRevD.65.023502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178306
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleSN1A data and the CMB of Modified Curvature at short and long distances
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