New Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations

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dc.creatorHamann, Jan
dc.creatorCovi, Laura
dc.creatorMelchiorri, Alessandro
dc.creatorSlosar, Anze
dc.date2007-01-12
dc.date.accessioned2026-07-07T11:00:40Z
dc.date.available2026-07-07T11:00:40Z
dc.descriptionWe revisit the problem of constraining steps in the inflationary potential with cosmological data. We argue that a step in the inflationary potential produces qualitatively similar oscillations in the primordial power spectrum, independently of the details of the inflationary model. We propose a phenomenological description of these oscillations and constrain these features using a selection of cosmological data including the baryonic peak data from the correlation function of luminous red galaxies in the Sloan Digital Sky Survey. Our results show that degeneracies of the oscillation with standard cosmological parameters are virtually non-existent. The inclusion of new data severely tightens the constraints on the parameter space of oscillation parameters with respect to older work. This confirms that extensions to the simplest inflationary models can be successfully constrained using cosmological data.
dc.description12 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0701380
dc.identifierhttp://arxiv.org/abs/astro-ph/0701380
dc.identifierPhys.Rev.D76:023503,2007
dc.identifierdoi:10.1103/PhysRevD.76.023503
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187732
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNew Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations
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