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26 April 2024 |
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Mid-infrared sources in the ELAIS Deep X-ray Survey | | J. C. Manners
; S. Serjeant
; S. Bottinelli
; M. Vaccari
; A. Franceschini
; I. Perez-Fournon
; E. Gonzalez-Solares
; C. J. Willott
; O. Johnson
; O. Almaini
; M. Rowan-Robinson
; S. Oliver
; | | Date: |
29 Sep 2004 | | Subject: | astro-ph | | Abstract: | We present a cross-correlation of the European Large Area ISO survey (ELAIS) with the ELAIS Deep X-ray Survey of the N1 and N2 fields. There are 7 Chandra point sources with matches in the ELAIS Final Analysis 15um catalogue, out of a total of 28 extragalactic ISO sources present in the Chandra fields. Five of these are consistent with AGN giving an AGN fraction of ~19 per cent in the 15um 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. | | Source: | arXiv, astro-ph/0409723 | | Services: | Forum | Review | PDF | Favorites | |
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