The Cross‐Correlation of High‐Redshift 21 cm and Galaxy Surveys
نویسندگان
چکیده
منابع مشابه
The Cross-correlation of High-redshift 21 Cm and Galaxy Surveys
We study the detectability of the cross-correlation between 21 cm emission from the intergalactic medium and the galaxy distribution during (and before) reionization. We show that first-generation 21 cm experiments, such as the Mileura Widefield Array (MWA), can measure the cross-correlation to a precision of several percent on scales k ∼ 0.1 Mpc if combined with a deep galaxy survey detecting ...
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One of the obvious tasks for the Square Kilometer Array is to perform deep neutral hydrogen 21-cm emission line surveys out to large redshifts. For the planning of these surveys, and for the interpretation of the results, it is important to have solid z = 0 benchmarks. This paper summarizes some of the results of local extragalactic 21-cm surveys and their implications on the interpretation of ...
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Many observations indicate that dark matter dominates the extra-galactic Universe, yet no totally dark structure of galactic proportions has ever been convincingly identified. Previously we have suggested that VIRGOHI 21, a 21-cm source we found in the Virgo Cluster using Jodrell Bank, was a possible dark galaxy because of its broad line-width (∼ 200 km s−1) unaccompanied by any visible gravita...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2007
ISSN: 0004-637X,1538-4357
DOI: 10.1086/513009