Looking for a varying $α$ in the Cosmic Microwave Background

Simple item page
dc.creatorAvelino, P. P.
dc.creatorMartins, C. J. A. P.
dc.creatorRocha, G.
dc.creatorViana, P.
dc.date2000-08-29
dc.date.accessioned2026-07-07T11:28:42Z
dc.date.available2026-07-07T11:28:42Z
dc.descriptionWe perform a likelihood analysis of the recently released BOOMERanG and MAXIMA data, allowing for the possibility of a time-varying fine-structure constant. We find that in general this data prefers a value of $α$ that was smaller in the past (which is in agreement with measurements of $α$ from quasar observations). However, there are some interesting degeneracies in the problem which imply that strong statements about $α$ can not be made using this method until independent accurate determinations of $Ω_b h^2$ and $H_0$ are available. We also show that a preferred lower value of $α$ comes mainly from the data points around the first Doppler peak, whereas the main effect of the high-$\ell$ data points is to increase the preferred value for $Ω_b h^2$ (while also tightening the constraints on $Ω_0$ and $H_0$). We comment on some implications of our results.
dc.description15 pages; submitted to Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/astro-ph/0008446
dc.identifierhttp://arxiv.org/abs/astro-ph/0008446
dc.identifierPhys.Rev.D62:123508,2000
dc.identifierdoi:10.1103/PhysRevD.62.123508
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196478
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLooking for a varying $α$ in the Cosmic Microwave Background
dc.typetext

Files

Collections

arXiv