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The European Large Area ISO Survey - IV. The preliminary 90-mum luminosity function

Serjeant, S.; Efstathiou, A.; Oliver, S.; Surace, C.; Héraudeau, P. and Linden-Vørnle, M.J.D. [et al.] (2001). The European Large Area ISO Survey - IV. The preliminary 90-mum luminosity function. Monthly Notices of the Royal Astronomical Society, 322(2) pp. 262–268.

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We present the luminosity function of 90-mum-selected galaxies from the European Large Area ISO Survey (ELAIS), extending to z=0.3. Their luminosities are in the range 109< h 65 -2L/Lsolar<1012, i.e. non-ultraluminous. From our sample of 37 reliably detected galaxies in the ELAIS S1 region from the Efstathiou et al. S90>=100mJy data base, we have found optical, 15-mum or 1.4-GHz identifications for 24 (65 per cent). We have obtained 2dF and UK Schmidt FLAIR spectroscopy of 89 per cent of identifications to rigid multivariate flux limits. We construct a luminosity function assuming that (i) our spectroscopic subset is an unbiased sparse sample, and (ii) there are no galaxies that would not be represented in our spectroscopic sample at any redshift. We argue that we can be confident of both assumptions. We find that the luminosity function is well described by the local 100-mum luminosity function of Rowan-Robinson, Helou & Walker. Assuming this local normalization, we derive luminosity evolution of (1+z)2.45+/-0.85 (95 per cent confidence). We argue that star formation dominates the bolometric luminosities of these galaxies, and we derive comoving star formation rates in broad agreement with the Flores et al. and Rowan-Robinson et al. mid-infrared-based estimates.

Item Type: Journal Article
ISSN: 1365-2966
Extra Information: Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract.
Keywords: surveys; galaxies; formation; starburst; cosmology; infrared
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 5820
Depositing User: Users 13 not found.
Date Deposited: 07 Nov 2006
Last Modified: 14 Jan 2016 16:17
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