Superimposed Oscillations in the WMAP Data?

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dc.creatorMartin, Jerome
dc.creatorRingeval, Christophe
dc.date2003-10-14
dc.date2004-05-26
dc.date.accessioned2026-07-07T10:27:05Z
dc.date.available2026-07-07T10:27:05Z
dc.descriptionThe possibility that the cosmic variance outliers present in the recently released WMAP multipole moments are due to oscillations in the primordial power spectrum is investigated. Since the most important contribution to the WMAP likelihood originates from the outliers at relatively small angular scale (around the first Doppler peak), special attention is paid to these in contrast with previous studies on the subject which have concentrated on the large scales outliers only (i.e. the quadrupole and octupole). As a physically motivated example, the case where the oscillations are of trans-Planckian origin is considered. It is shown that the presence of the oscillations causes an important drop in the WMAP chi square of about fifteen. The F-test reveals that such a drop has a probability less than 0.06% to occur by chance and can therefore be considered as statistically significant.
dc.description9 pages, 3 figures, uses RevTex 4, references added, matches published version
dc.identifierhttps://arxiv.org/abs/astro-ph/0310382
dc.identifierhttp://arxiv.org/abs/astro-ph/0310382
dc.identifierPhys.Rev.D69:083515,2004
dc.identifierdoi:10.1103/PhysRevD.69.083515
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177051
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleSuperimposed Oscillations in the WMAP Data?
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