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Foregrounds in wide-field Redshifted 21 cm power spectra

Bowman, Judd D; Beardsley, A; Bernardi, G; Briggs, Franklin; Ewall-Wice, Aaron; Greenhill, Lincoln; Hazelton, B; Johnston-Hollitt, M; Loeb, Abraham; McKinley, Benjamin; Oberoi, D; Offringa, Andre; Prabu, T; Rogers, Alan; Srivani, K. S.; Whitney, Alan; Wyithe, J Stuart B

Description

Detection of 21 cm emission of H i from the epoch of reionization, at redshifts , is limited primarily by foreground emission. We investigate the signatures of wide-field measurements and an all-sky foreground model using the delay spectrum technique that maps the measurements to foreground object locations through signal delays between antenna pairs. We demonstrate interferometric measurements are inherently sensitive to all scales, including the largest angular scales, owing to the nature of...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
URI: http://hdl.handle.net/1885/69727
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/804/1/14

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