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HerMES : SPIRE galaxy number counts at 250, 350, and 500 μm

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Oliver, S. J., Wang, L., Smith, A. J., Altieri, B., Amblard, A., Arumugam, V., Auld, R., Aussel, H., Babbedge, T., Blain, A. W. (Andrew W.) et al.
(2010) HerMES : SPIRE galaxy number counts at 250, 350, and 500 μm. Astronomy & Astrophysics, Vol.518 (No.L21). doi:10.1051/0004-6361/201014697

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Abstract

Emission at far-infrared wavelengths makes up a significant fraction of the total light detected from galaxies over the age of Universe. Herschel provides an opportunity for studying galaxies at the peak wavelength of their emission. Our aim is to provide a benchmark for models of galaxy
population evolution and to test pre-existing models of galaxies.With the Herschel Multi-tiered Extra-galactic survey, HerMES, we have observed a number of fields of different areas and sensitivity using the SPIRE instrument on Herschel. We have determined the number counts of galaxies down to ∼20 mJy. Our constraints from directly counting galaxies are consistent with, though more precise than, estimates from the BLAST fluctuation analysis. We have found a steep rise in the Euclidean normalised counts <100 mJy. We have directly resolved ∼15% of the infrared
extra-galactic background at the wavelength near where it peaks.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Centre for Systems Biology
Library of Congress Subject Headings (LCSH): Galaxies -- Evolution, Galaxies -- Statistics, Infrared astronomy
Journal or Publication Title: Astronomy & Astrophysics
Publisher: EDP Sciences
ISSN: 0004-6361
Official Date: July 2010
Dates:
DateEvent
July 2010Published
Volume: Vol.518
Number: No.L21
DOI: 10.1051/0004-6361/201014697
Status: Peer Reviewed
Access rights to Published version: Open Access
Funder: Science and Technology Facilities Council (Great Britain) (STFC), Canadian Space Agency (CSA), National Astronomical Observatory of China (NAOC), France. Commissariat à l'énergie atomique (CEA), Centre national d'études spatiales (France) (CNES), Centre national de la recherche scientifique (France) (CNRS), Agenzia spaziale italiana [Italian Space Agency] (ASI), Spain. Ministerio de Ciencia e Innovación (MICINN), Rymdstyrelsen [Swedish National Space Board] (SNSB), United States. National Aeronautics and Space Administration (NASA)
Grant number: ST/F002858/1 (STFC)

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