THE CORRELATION FUNCTION OF OPTICALLY SELECTED GALAXY CLUSTERS IN THE SLOAN DIGITAL SKY SURVEY
作者： Joshua A. Frieman , Joshua A. Frieman , Juan Estrada , Emiliano Sefusatti
DOI: 10.1088/0004-637X/692/1/265
关键词: Galaxy cluster 、 Sky 、 Cluster (physics) 、 Astrophysics 、 Physics 、 Astronomy 、 Spatial correlation 、 Power law 、 Photometric redshift 、 Cluster sampling 、 Correlation function (statistical mechanics)
摘要: We measure the two-point spatial correlation function for clusters selected from photometric MaxBCG galaxy cluster catalog Sloan Digital Sky Survey (SDSS). evaluate several samples using different cuts in richness. Fitting results to power laws, ?cc(r) = (r/R 0)??, estimated length R 0 as a of richness is broadly consistent with previous observations and expectations N-body simulations. study how linear bias parameter scales compare our theoretical predictions. Since these measurements extend very large scales, we also them models that include baryon acoustic oscillation feature account smoothing effects induced by errors redshift estimates. For largest sample, corresponding threshold N 200 ? 10, find only weak evidence, about 1.4?-1.7? significance, baryonic signature function.
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