Angular Clustering of Galaxies at 3.6 Microns from the Spitzer Wide-area Infrared Extragalactic (SWIRE) Survey

Details Angular Clustering of Galaxies at 3.6 Microns from the Spitzer Wide-area Infrared Extragalactic (SWIRE) Survey Angular Clustering of Galaxies at 3.6 Microns from the Spitzer Wide-area Infrared Extragalactic (SWIRE) Survey

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apjs..154...30o&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 154, Issue 1, pp. 30-34.

Statistics

16

Galaxies: Evolution, Galaxies: Statistics, Infrared: Galaxies, Cosmology: Large-Scale Structure Of Universe

Scientific paper

We present the first analysis of large-scale clustering from the Spitzer Wide-area Infrared Extragalactic legacy survey (SWIRE). We compute the angular correlation function of galaxies selected to have 3.6 μm fluxes brighter than 32 μJy in three fields totaling 2 deg2 in area. In each field we detect clustering with a high level of significance. The amplitude and slope of the correlation function is consistent between the three fields and is modeled as w(θ)=Aθ1-γ with A=(0.6+/-0.3)×10-3,γ=2.03+/-0.10. With a fixed slope of γ=1.8, we obtain an amplitude of A=(1.7+/-0.1)×10-3. Assuming an equivalent depth of K~18.7 mag we find that our errors are smaller but our results are consistent with existing clustering measurements in K-band surveys and with stable clustering models. We estimate our median redshift z~=0.75, and this allows us to obtain an estimate of the three-dimensional correlation function ξ(r), for which we find r0=4.4+/-0.1h-1 Mpc.

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