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dc.contributor.authorBarkana, Rennan
dc.contributor.authorLoeb, Abraham
dc.date.accessioned2019-09-27T13:19:16Z
dc.date.issued2008
dc.identifier.citationBarkana, Rennan, and Abraham Loeb. 2008. “The Difference PDF of 21-Cm Fluctuations: A Powerful Statistical Tool for Probing Cosmic Reionization.” Monthly Notices of the Royal Astronomical Society 384 (3): 1069–79. https://doi.org/10.1111/j.1365-2966.2007.12729.x.
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41417394*
dc.description.abstractA new generation of radio telescopes are currently being built with the goal of tracing the cosmic distribution of atomic hydrogen at redshifts 6-15 through its 21-cm line. The observations will probe the large-scale brightness fluctuations sourced by ionization fluctuations during cosmic reionization. Since detailed maps will be difficult to extract due to noise and foreground emission, efforts have focused on a statistical detection of the 21-cm fluctuations. During cosmic reionization, these fluctuations are highly non-Gaussian and thus more information can be extracted than just the one-dimensional function that is usually considered, i.e. the correlation function. We calculate a two-dimensional function that if measured observationally would allow a more thorough investigation of the properties of the underlying ionizing sources. This function is the probability distribution function (PDF) of the difference in the 21-cm brightness temperature between two points, as a function of the separation between the points. While the standard correlation function is determined by a complicated mixture of contributions from density and ionization fluctuations, we show that the difference PDF holds the key to separately measuring the statistical properties of the ionized regions.
dc.language.isoen_US
dc.publisherOxford University Press
dash.licenseLAA
dc.titleThe difference PDF of 21-cm fluctuations: a powerful statistical tool for probing cosmic 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.available2019-09-27T13:19:16Z
dash.workflow.comments1Science Serial ID 66281
dc.identifier.doi10.1111/j.1365-2966.2007.12729.x
dash.source.volume384;3
dash.source.page1069-1079


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