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The faint end of the 250 μm luminosity function at z < 0.5

Wang, , Dunne, Loretta, Eales, Stephen and Maddox, Steve 2016. The faint end of the 250 μm luminosity function at z < 0.5. Astronomy and Astrophysics 592 , L5. 10.1051/0004-6361/201629076

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Abstract

Aims. We aim to study the 250 μm luminosity function (LF) down to much fainter luminosities than achieved by previous efforts. Methods. We developed a modified stacking method to reconstruct the 250 μm LF using optically selected galaxies from the SDSS survey and Herschel maps of the GAMA equatorial fields and Stripe 82. Our stacking method not only recovers the mean 250 μm luminosities of galaxies that are too faint to be individually detected, but also their underlying distribution functions. Results. We find very good agreement with previous measurements in the overlapping luminosity range. More importantly, we are able to derive the LF down to much fainter luminosities (~ 25 times fainter) than achieved by previous studies. We find strong positive luminosity evolution L*250(z)∝(1+z)4.89±1.07 and moderate negative density evolution Φ*250(z)∝(1+z)-1.02±0.54 over the redshift range 0.02 <z< 0.5.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Publisher: EDP Sciences
ISSN: 0004-6361
Date of First Compliant Deposit: 16 August 2017
Date of Acceptance: 1 July 2016
Last Modified: 24 May 2018 16:33
URI: http://orca.cardiff.ac.uk/id/eprint/103657

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