1. The European Large Area ISO Survey - IV. The preliminary 90-μm luminosity function
- Author
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S. J. Oliver, T. J. Sumner, F. La Franca, Thierry Morel, Matthew J. Graham, Michael Rowan-Robinson, H. Crockett, Andreas Efstathiou, M. Linden-Vørnle, Steve Serjeant, Christian Surace, Carlotta Gruppioni, D. Rigopoulou, P. Heraudeau, Department of Physics and Astronomy [Milton Keynes], The Open University [Milton Keynes] (OU), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), AUTRES, Department of Physics [Oxford], University of Oxford [Oxford], Science et Ingénierie des Matériaux et Procédés (SIMaP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Imperial College London, University of Oxford, Laboratoire de thermodynamique et physico-chimie métallurgiques (LTPCM), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Serjeant, S, Efstathiou, A, Oliver, S, Surace, C, Heraudeau, P, Linden Vornle, Mjd, Gruppioni, C, LA FRANCA, Fabio, Rigopoulou, D, Morel, T, Crockett, H, Sumner, T, Rowan Robinson, M, and Graham, M.
- Subjects
GALAXIES: EVOLUTION ,starburst ± cosmology ,010504 meteorology & atmospheric sciences ,Astrophysics::High Energy Astrophysical Phenomena ,GALAXIES: STARBURST ,COSMOLOGY: OBSERVATIONS ,FOS: Physical sciences ,Flux ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Luminosity ,observations ± infrared ,0103 physical sciences ,galaxies ,Range (statistics) ,Astrophysics::Solar and Stellar Astrophysics ,[INFO]Computer Science [cs] ,Spectroscopy ,GALAXIES: FORMATION ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,0105 earth and related environmental sciences ,Luminosity function (astronomy) ,Physics ,Star formation ,Astrophysics (astro-ph) ,Astronomy and Astrophysics ,Redshift ,Galaxy ,INFRARED: GALAXIES ,Space and Planetary Science ,surveys ± galaxies ,evolution ± galaxies ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,SURVEYS ,formation ± galaxies - Abstract
We present the luminosity function of 90um selected galaxies from the European Large Area ISO Survey (ELAIS), extending to z=0.3. Their luminosities are in the range 10^9 < h_65^-2 L/Lsun < 10^12, i.e. non-ultraluminous. From our sample of 37 reliably detected galaxies in the ELAIS S1 region from the Efstathiou et al. (2000) S_90 >= 100mJy database, we found optical, 15um or 1.4GHz identifications for 24 (65%). We have obtained 2dF and UK Schmidt FLAIR spectroscopy of 89% of IDs to rigid multivariate flux limits. We construct a luminosity function assuming (a) our spectroscopic subset is an unbiased sparse sample, and (b) there are no galaxies which would not be represented in our spectroscopic sample at {\it any} redshift. We argue that we can be confident of both assumptions. We find the luminosity function is well-described by the local 100um luminosity function of Rowan-Robinson, Helou & Walker (1987). {\it Assuming} this local normalisation, we derive luminosity evolution of (1+z)^{2.45\pm0.85} (95% 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. (1999) and Rowan-Robinson et al. (1997) mid-IR-based estimates., MNRAS in press. 8 pages. Uses BoxedEPS (included). For more information on the ELAIS project see http://athena.ph.ic.ac.uk:80/
- Published
- 2001