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The Correlation Function of Optically Selected Galaxy Clusters in the Sloan Digital Sky Survey | | Juan Estrada
; Emiliano Sefusatti
; Joshua A. Frieman
; | | Date: |
23 Jan 2008 | | Abstract: | We measure the two-point spatial correlation function for clusters selected
from the photometric MaxBCG galaxy cluster catalog for the Sloan Digital Sky
Survey (SDSS). We evaluate the correlation function for several cluster samples
using different cuts in cluster richness. Fitting the results to power-laws,
$xi_{cc}(r) = (r/R_0)^{-gamma}$, the estimated correlation length $R_0$ as a
function of richness is broadly consistent with previous cluster observations
and with expectations from N-body simulations. Since these measurements extend
to very large scales, we also compare them to models that include the baryon
acoustic oscillation feature and that account for the smoothing effects induced
by errors in the cluster photometric redshift estimates. For the largest
cluster sample, corresponding to a richness threshold of $Ngge 10$, we find
weak evidence, of about $1.4-1.7sigma$ significance, for the baryonic acoustic
oscillation signature in the cluster correlation function. | | Source: | arXiv, 0801.3485 | | Services: | Forum | Review | PDF | Favorites | |
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