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Large-scale structure in the ELAIS S1 Survey

Gonzalez-Solares, E.A.; Oliver, S.; Gruppioni, C.; Pozzi, F.; Lari, C.; Rowan-Robinson, M.; Serjeant, S.; La Franca, F. and Vaccari, M. (2004). Large-scale structure in the ELAIS S1 Survey. Monthly Notices of the Royal Astronomical Society, 352(1) pp. 44–48.

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We present an analysis of the two-point angular correlation function of The European Large-Area Infrared Space Observatory (ELAIS) S1 survey. The survey covers 4 deg2 and contains 462 sources detected at 15 mum to a 5sigma flux limit of 0.45 mJy. Using the 329 extragalactic sources not repeated in different observations, we detect a significant clustering signal; the resulting angular correlation function can be fitted by a power law w(theta) =Atheta1-gamma with A= 0.014 +/- 0.005 and gamma= 2.04 +/- 0.18. Using the observed redshift distribution of the objects (from spectroscopic and photometric redshifts), we invert Limber's equation and deduce a spatial correlation length r0= 4.3+0.4-0.7h-1 Mpc. This is smaller than that obtained from optical surveys but it is in agreement with results from IRAS. This extends to higher redshift the observational evidence that infrared selected surveys show smaller correlation lengths (i.e. reduced clustering amplitudes) than optical surveys.

Item Type: Journal Item
ISSN: 1365-2966
Extra Information: Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract.
Keywords: clusters; galaxies; evolution; cosmology; observations; large-scale; structure of Universe; infrared
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Space
Item ID: 5668
Depositing User: Users 13 not found.
Date Deposited: 25 Oct 2006
Last Modified: 07 Dec 2018 08:59
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