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

September 2004 • 2004ApJS..154...30O

Authors • Oliver, Seb • Waddington, Ian • Gonzalez-Solares, Eduardo • Surace, Jason • Fang, Fan • Shupe, Dave • Jarrett, Tom • Lonsdale, Carol • Xu, Cong (Kevin) • Farrah, Duncan • Salaman, Malcolm • Rowan-Robinson, Michael • Siana, Brian • Smith, H. E. (Gene)

Abstract • 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)=Aθ^1-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.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2004ApJS..154...30O
• PDF https://stacks.iop.org/0067-0049/154/30/pdf
• DATA https://irsa.ipac.caltech.edu/bibdata/2004/O/2004ApJS..154...30O.html
• ELECTR https://doi.org/10.1086%2F422886