Mid-infrared sources in the ELAIS Deep X-ray Survey

Manners, J.C. and Serjeant, Stephen and Bottinelli, S. and Vaccari, Mattia and Franceschini, Alberto and Perez-Fournon, Ismael and Gonzalez-Solares, Eduardo and Willott, C.J. and Johnson, O. and Almaini, O. and Rowan-Robinson, Michael and Oliver, Seb (2004) Mid-infrared sources in the ELAIS Deep X-ray Survey. Monthly Notices of the Royal Astronomical Society, 355 (1). pp. 97-105. ISSN 0035-8711. (The full text of this publication is not available from this repository)

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Abstract

We present a cross-correlation of the European Large Area Infrared Space Observatory (ISO) survey (ELAIS) with the ELAIS Deep X-ray Survey of the N1 and N2 fields. There are seven Chandra point sources with matches in the ELAIS Final Analysis 15-mum catalogue, out of a total of 28 extragalactic ISO sources present in the Chandra fields. Five of these are consistent with active galactic nuclei (AGN) giving an AGN fraction of similar to19 per cent in the 15-mum flux range 0.8-6 mJy. We have co-added the hard X-ray fluxes of the individually undetected ISO sources and find a low significance detection consistent with star formation in the remaining population. We combine our point source cross-correlation fraction with the XMM-Newton observations of the Lockman Hole and Chandra observations of the Hubble Deep Field North to constrain source count models of the mid-infrared galaxy population. The low dust-enshrouded AGN fraction in ELAIS implied by the number of cross-identifications between the ELAIS mid-infrared sample and the Chandra point sources is encouraging for the use of mid-infrared surveys to constrain the cosmic star formation history, provided there are not further large undetected populations of Compton-thick AGN.

Item Type: Article
Additional information: 38 BLACKWELL PUBLISHING LTD 870MQ
Uncontrolled keywords: surveys; galaxies : active; quasars : general; X-rays : galaxies; X-rays : general
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Maggie Francis
Date Deposited: 25 Sep 2008 16:35
Last Modified: 18 Jul 2014 10:50
Resource URI: http://kar.kent.ac.uk/id/eprint/11794 (The current URI for this page, for reference purposes)
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