The Angular Clustering of Distant Galaxy Clusters

摘要: We discuss the angular clustering of galaxy clusters at -->z > 1 selected within 50 deg2 from Spitzer Wide-Infrared Extragalactic survey. use a simple color selection to identify high-redshift galaxies with no dependence on rest-frame optical using IRAC 3.6 and 4.5 μm photometry. The majority (>90%) 1.3 are identified ( -->[3.6] − [4.5])AB 0.1 mag. candidate by selecting overdensities ≥26-28 objects [4.5] mag radii -->1.4', which corresponds -->r z = 1.5. These show strong clustering, an correlation function represented -->w(θ ) (3.1 ± 0.5)(θ/1')−1.1 over scales -->2'- -->100'. Assuming redshift distribution these follows fiducial model, have spatial-clustering scale length -->r0 22.4 h−1 Mpc comoving number density -->n 1.2 × 10−5 -->h3 Mpc−3. comparable those rich low redshift. dark matter halos larger than -->(3–5) 1013 -->h−1 -->M☉ hosting grow following ΛCDM models, will reside in -->(1–2) 1014 0.2, clusters.