Primordial Helium Abundance from CMB: a constraint from recent observations and a forecast

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dc.creatorIchikawa, Kazuhide
dc.creatorSekiguchi, Toyokazu
dc.creatorTakahashi, Tomo
dc.date2007-12-28
dc.date2008-08-18
dc.date.accessioned2026-07-07T11:54:53Z
dc.date.available2026-07-07T11:54:53Z
dc.descriptionWe studied a constraint on the primordial helium abundance Y_p from current and future observations of CMB. Using the currently available data from WMAP, ACBAR, CBI and BOOMERANG, we obtained the constraint as Y_p = 0.25^{+0.10}_{-0.07} at 68% C.L. We also provide a forecast for the Planck experiment using the Markov chain Monte Carlo approach. In addition to forecasting the constraint on Y_p, we investigate how assumptions for Y_p affect constraints on the other cosmological parameters.
dc.description17 pages, 6 figures, 4 tables; update after WMAP 5-year results, accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0712.4327
dc.identifierhttp://arxiv.org/abs/0712.4327
dc.identifierPhys.Rev.D78:043509,2008
dc.identifierdoi:10.1103/PhysRevD.78.043509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205066
dc.subjectAstrophysics
dc.titlePrimordial Helium Abundance from CMB: a constraint from recent observations and a forecast
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