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

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Version 2 2023-06-12, 06:43
Version 1 2023-06-09, 02:26
journal contribution
posted on 2023-06-12, 06:43 authored by L Wang, P Norberg, M Bethermin, N Bourne, A Cooray, W Cowley, L Dunne, L Dye, S Eales, D Farrah, C Lacey, Jonathan LovedayJonathan Loveday, S Maddox, Seb OliverSeb Oliver, M Viero
Aims. We aim to study the 250 micron luminosity function (LF) down to much fainter luminosities than achieved by previous efforts. Methods. We developed a modified stacking method to reconstruct the 250 micron 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 micron 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 (around 25 times fainter) than achieved by previous studies. We find strong positive luminosity evolution \propto (1 + z)^4.89\pm1.07 and moderate negative density evolution \propto (1 + z)^-1.02\pm0.54 over the redshift range z=[0.02, 0.5].

Funding

Astronomy Centre Rolling Grant; G0679; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/F002858/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Astronomy and Astrophysics

ISSN

0004-6361

Publisher

EDP Sciences

Volume

592

Page range

L5

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-08-08

First Open Access (FOA) Date

2016-08-08

First Compliant Deposit (FCD) Date

2016-08-08

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