Possibility of precise measurement of the cosmological power spectrum with a dedicated survey of 21 cm emission after reionization

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dc.contributor.authorLoeb, Abrahamen
dc.contributor.authorWyithe, J. Stuart B.en
dc.date.accessioned2025-12-23T17:40:20Z
dc.date.available2025-12-23T17:40:20Z
dc.date.issued2008-04-16en
dc.description.abstractMeasurements of the 21 cm line emission by residual cosmic hydrogen after reionization can be used to trace the power spectrum of density perturbations through a significant fraction of the observable volume of the Universe. We show that a dedicated 21cm observatory could probe a number of independent modes that is 2 orders of magnitude larger than currently available, and enable a cosmic-variance limited detection of the signature of a neutrino mass ∼0.05eV. The evolution of the linear growth factor with redshift could also constrain exotic theories of gravity or dark energy to an unprecedented precision.en
dc.description.statusPeer-revieweden
dc.format.extent4en
dc.identifier.issn0031-9007en
dc.identifier.otherORCID:/0000-0001-7956-9758/work/196588393en
dc.identifier.scopus42449129219en
dc.identifier.urihttps://hdl.handle.net/1885/733797023
dc.language.isoenen
dc.sourcePhysical Review Lettersen
dc.titlePossibility of precise measurement of the cosmological power spectrum with a dedicated survey of 21 cm emission after reionizationen
dc.typeJournal articleen
dspace.entity.typePublicationen
local.contributor.affiliationLoeb, Abraham; Harvard Universityen
local.contributor.affiliationWyithe, J. Stuart B.; University of Melbourneen
local.identifier.citationvolume100en
local.identifier.doi10.1103/PhysRevLett.100.161301en
local.identifier.pure73178c67-4143-4f37-a36c-a069f05b314een
local.identifier.urlhttps://www.scopus.com/pages/publications/42449129219en
local.type.statusPublisheden

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