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The HerMES submillimetre local and low-redshift luminosity functions

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posted on 2023-06-08, 23:56 authored by L Marchetti, M Vaccari, A Franceschini, V Arumugam, H Aussel, M Béthermin, J Bock, A Boselli, V Buat, D Burgarella, D L Clements, A Conley, L Conversi, A Cooray, C D Dowell, D Farrah, A Feltre, J Glenn, M Griffin, E Hatziminaoglou, S Heinis, E Ibar, R J Ivison, H T Nguyen, B O'Halloran, Seb OliverSeb Oliver, M J Page, A Papageorgiou, C P Pearson, I Pérez-Fournon, M Pohlen, D Rigopoulou, I G Roseboom, M Rowan-Robinson, B Schulz, Douglas Scott, N Seymour, D L Shupe, A J Smith, M Symeonidis, I Valtchanov, M Viero, L Wang, J Wardlow, C K Xu, M Zemcov
We used wide-area surveys over 39 deg2 by the HerMES (Herschel Multi-tiered Extragalactic Survey) collaboration, performed with the Herschel Observatory SPIRE multiwavelength camera, to estimate the low-redshift, 0.02 < z < 0.5, monochromatic luminosity functions (LFs) of galaxies at 250, 350 and 500 µm. Within this redshift interval, we detected 7087 sources in five independent sky areas, ~40 per cent of which have spectroscopic redshifts, while for the remaining objects photometric redshifts were used. The SPIRE LFs in different fields did not show any field-to-field variations beyond the small differences to be expected from cosmic variance. SPIRE flux densities were also combined with Spitzer photometry and multiwavelength archival data to perform a complete spectral energy distribution fitting analysis of SPIRE detected sources to calculate precise k-corrections, as well as the bolometric infrared (IR; 8–1000 µm) LFs and their low-z evolution from a combination of statistical estimators. Integration of the latter prompted us to also compute the local luminosity density and the comoving star formation rate density (SFRD) for our sources, and to compare them with theoretical predictions of galaxy formation models. The LFs show significant and rapid luminosity evolution already at low redshifts, 0.02 < z < 0.2, with L* IR ? (1 + z)6.0±0.4 and _*IR? (1 + z)-2.1±0.4, L*250? (1 + z)5.3±0.2 and _*250? (1 + z)-0.6±0.4 estimated using the IR bolometric and the 250 µm LFs, respectively. Converting our IR LD estimate into an SFRD assuming a standard Salpeter initial mass function and including the unobscured contribution based on the UV dust-uncorrected emission from local galaxies, we estimate an SFRD scaling of SFRD0 + 0.08z, where SFRD0 _ (1.9 ± 0.03) × 10-2 [M_ Mpc-3] is our total SFRD estimate at z ~ 0.02.

Funding

SPIRE; G0649; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; 07-40001

History

Publication status

  • Published

File Version

  • Published version

Journal

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

Publisher

Oxford Journals

Issue

2

Volume

456

Page range

1999-2023

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-01-11

First Open Access (FOA) Date

2016-01-11

First Compliant Deposit (FCD) Date

2016-01-11

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