Extragalactic number counts at 100 μm, free from cosmic variance

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DOIResolve DOI: http://doi.org/10.1093/mnrasl/sls002
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TypeArticle
Journal titleMonthly Notices of the Royal Astronomical Society: Letters
ISSN1745-3925
Volume428
Issue1
PagesL6L10
AbstractWe use data from the Disc Emission via a Bias-free Reconnaissance in the Infrared/ Submillimetre (DEBRIS) survey, taken at 100 μm with the Photoconductor Array Camera and Spectrometer instrument on board the Herschel Space Observatory, to make a cosmic variance independent measurement of the extragalactic number counts. These data consist of 323 small-area mapping observations performed uniformly across the sky, and thus represent a sparse sampling of the astronomical sky with an effective coverage of ~2.5 deg2. We find our cosmic variance independent analysis to be consistent with previous count measurements made using relatively small area surveys. Furthermore, we find no statistically significant cosmic variance on any scale within the errors of our data. Finally, we interpret these results to estimate the probability of galaxy source confusion in the study of debris discs. © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270541
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Record identifierb880d409-ebdb-43af-976f-1af5a8668892
Record created2014-02-17
Record modified2016-05-09
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