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dc.contributor.authorWyithe, J. Stuart B.
dc.contributor.authorLoeb, Abraham
dc.date.accessioned2019-09-26T15:01:05Z
dc.date.issued2009
dc.identifier.citationWyithe, J. Stuart B., and Abraham Loeb. 2009. “The 21-Cm Power Spectrum after Reionization.” Monthly Notices of the Royal Astronomical Society 397 (4): 1926–34. https://doi.org/10.1111/j.1365-2966.2009.15019.x.
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41412158*
dc.description.abstractWe discuss the 21-cm power spectrum (PS) following the completion of reionization. In contrast to the reionization era, this PS is proportional to the PS of mass density fluctuations, with only a small modulation due to fluctuations in the ionization field on scales larger than the mean-free-path of ionizing photons. We derive the form of this modulation, and demonstrate that its effect on the 21-cm PS will be smaller than 1 per cent for physically plausible models of damped Ly alpha systems. In contrast to the 21-cm PS observed prior to reionization, in which H ii regions dominate the ionization structure, the simplicity of the 21-cm PS after reionization will enhance its utility as a cosmological probe by removing the need to separate the PS into physical and astrophysical components. As a demonstration, we consider the Alcock-Paczynski test and show that the next generation of low-frequency arrays could measure the angular distortion of the PS at the per cent level for z similar to 3-5.
dc.language.isoen_US
dc.publisherOxford University Press
dash.licenseLAA
dc.titleThe 21-cm power spectrum after reionization
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalMonthly Notices of the Royal Astronomical Society
dash.depositing.authorLoeb, Abraham::e022a3952362350ac8a0138f128a8be7::600
dc.date.available2019-09-26T15:01:05Z
dash.workflow.comments1Science Serial ID 66349
dc.identifier.doi10.1111/j.1365-2966.2009.15019.x
dash.source.volume397;4
dash.source.page1926-1934


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