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

Wang, L.; Norberg, P.; Bethermin, M.; Bourne, N.; Cooray, A.; Cowley, W.; Dunne, L.; Dye, S.; Eales, S.; Farrah, D.; Lacey, C.; Loveday, J.; Maddox, S.; Oliver, S.; Viero, M.

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


Authors

L. Wang

M. Bethermin

N. Bourne

A. Cooray

W. Cowley

L. Dunne

S. Dye

S. Eales

D. Farrah

J. Loveday

S. Maddox

S. Oliver

M. Viero



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

Citation

Wang, L., Norberg, P., Bethermin, M., Bourne, N., Cooray, A., Cowley, W., …Viero, M. (2016). The faint end of the 250 μm luminosity function at z < 0.5. Astronomy & Astrophysics, 592, Article L5. https://doi.org/10.1051/0004-6361/201629076

Journal Article Type Article
Acceptance Date Jul 1, 2016
Online Publication Date Aug 1, 2016
Publication Date Aug 1, 2016
Deposit Date Sep 28, 2016
Publicly Available Date Oct 6, 2016
Journal Astronomy and astrophysics.
Print ISSN 0004-6361
Electronic ISSN 1432-0746
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 592
Article Number L5
DOI https://doi.org/10.1051/0004-6361/201629076

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Copyright Statement
Reproduced with permission from Astronomy & Astrophysics, © ESO.





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