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ISOCAM Deep Surveys and the Cosmic Infrared Background

Published online by Cambridge University Press:  30 March 2016

David Elbaz
David Elbaz*
Affiliation:
CEA-Saclay/DAPNIA/Service d’Astrophysique, University of California, Santa Cruz: Physics Department & UCO/Lick Observatory

Abstract

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The steep slope of the ISOCAM 15 μm number counts indicates that infrared galaxies have strongly evolved since z ∼ 1 − 1.5. A nearly complete spectroscopic sample of ISOCAM galaxies in the Hubble Deep Field North (HDFN) shows that their redshift distribution is peaked around z ∼ 0.8. We show that the 7 μm luminosity of local galaxies is correlated with their 8-1000 μm luminosity, and therefore star formation rate (SFR). We use this correlation in the rest-frame of the ISOCAM galaxies to deduce their IR luminosities (∼ 4 × 1011L⊙), SFR (∼ 80 M⊙yr−1) and contribution to the peak of the cosmic IR background (CIRB) at 140 μm. We find that they most probably produce the bulk of the CIRB.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 12: Highlights of Astronomy. As presented at the XXIVth General Assembly of the IAU, 2000 , 2002 , pp. 485 - 488
Copyright
Copyright © Astronomical Society of Pacific 2002

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