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Improved limits on the tensor-to-scalar ratio using BICEP and P l a n c k data

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dc.abstract.enWe present constraints on the tensor-to-scalar ratio r using a combination of BICEP/Keck 2018 (BK18) and Planck PR4 data allowing us to fit for r consistently with the six parameters of the Λ CDM model. We discuss the sensitivity of constraints on r to uncertainties in the Λ CDM parameters as defined by the Planck data. In particular, we are able to derive a constraint on the reionization optical depth τ and thus propagate its uncertainty into the posterior distribution for r . While Planck sensitivity to r is slightly lower than the current ground-based measurements, the combination of Planck with BK18 and baryon-acoustic-oscillation data yields results consistent with r =0 and tightens the constraint to r <0.032 at 95% confidence.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorSvalheim, T. L.
dc.contributor.authorAndersen, K. J.
dc.contributor.authorMartínez-González, E.
dc.contributor.authorWehus, I. K.
dc.contributor.authorKeskitalo, R.
dc.contributor.authorLawrence, C. R.
dc.contributor.authorPartridge, B.
dc.contributor.authorGórski, Krzysztof
dc.contributor.authorScott, D.
dc.contributor.authorBanday, A. J.
dc.contributor.authorTristram, M.
dc.contributor.authorColombo, L. P. L.
dc.contributor.authorEriksen, H. K.
dc.contributor.authorBarreiro, R. B.
dc.contributor.authorBorrill, J.
dc.contributor.authorFernandez-Cobos, R.
dc.contributor.authorKisner, T. S.
dc.date.accessioned2024-01-25T03:58:49Z
dc.date.available2024-01-25T03:58:49Z
dc.date.copyright2021-12-15
dc.date.issued2022
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number8
dc.description.versionORIGINAL_AUTHOR
dc.description.volume105
dc.identifier.doi10.1103/PHYSREVD.105.083524
dc.identifier.issn2470-0010
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/109104
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022PhRvD.105h3524T
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofPhysical Review D
dc.relation.pages083524
dc.rightsOther
dc.sciencecloudnosend
dc.titleImproved limits on the tensor-to-scalar ratio using BICEP and P l a n c k data
dc.typeJournalArticle
dspace.entity.typePublication