Properties of FIRBACK-ELAIS 175-mu m sources in the ELAIS N2 region

Taylor, E.L. and Mann, Robert G. and Efstathiou, Andreas and Babbedge, Tom and Rowan-Robinson, Michael and Lagache, G. and Lawrence, A. and Mei, S. and Vaccari, Mattia and Heraudeau, Philippe and Oliver, S.J. and Dennefeld, M. and Perez-Fournon, Ismael and Serjeant, Stephen and Gonzalez-Solares, Eduardo and Puget, J.L. and Dole, Herve and Lari, C. (2005) Properties of FIRBACK-ELAIS 175-mu m sources in the ELAIS N2 region. Monthly Notices of the Royal Astronomical Society, 361 (4). pp. 1352-1374. ISSN 0035-8711. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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We report on a search for the optical counterparts of 175-mu m selected sources from the Far-Infrared Background (FIRBACK) survey in the European Large Area ISO Survey (ELAIS) N2 field. Applying a likelihood ratio technique to optical catalogues from the Isaac Newton Telescope - Wide Field Survey (INT-WFS), we found optical identifications for 33 out of 55 FIRBACK sources in this field. These were then reassessed in the light of associations with the ELAIS final catalogue for the N2 field, to yield a final set of 31 associations. We have investigated the nature of this population through a comparison of their observed spectral energy distributions (SEDs) with predictions from radiative transfer models which simulate the emission from both cirrus and starburst components. We find the far-infrared sources to be 80 per cent starburst galaxies with their starburst component at a high optical depth. The resulting SEDs were used to estimate far-infrared luminosities, star formation rates (SFRs), dust temperatures and dust masses. The N2 FIRBACK population is found to consist of four suspected ultraluminous infrared galaxies (ULIRGs) with L-FIR similar to 10(12) L-circle dot and SFRFIR > 100 M-circle dot yr(-1), a number of luminous infrared galaxies (LIRGs) with moderate star formation rates and L-FIR similar to 10(11) L-circle dot and a population of low-redshift quiescently star-forming galaxies. We also discuss the implications of these results for current evolutionary models.

Item Type: Article
Additional information: 46 BLACKWELL PUBLISHING 958PF
Uncontrolled keywords: surveys; galaxies : evolution; galaxies : fundamental parameters; galaxies : starburst; infrared : galaxies AREA ISO SURVEY; UNIVERSE GALAXY SURVEY; STAR-FORMATION RATES; HUBBLE-DEEP-FIELD; 170 MU-M; FINAL ANALYSIS; NUMBER COUNTS; DUST; SUBMILLIMETER; EVOLUTION
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Maggie Francis
Date Deposited: 12 Sep 2008 22:40
Last Modified: 18 Jul 2014 10:50
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