Vicent J. Martínez et al 2009 ApJ 696 L93 doi:10.1088/0004-637X/696/1/L93
Vicent J. Martínez1,2, Pablo Arnalte-Mur1,2, Enn Saar3, Pablo de la Cruz1, María Jesús Pons-Bordería4, Silvestre Paredes5, Alberto Fernández-Soto6 and Elmo Tempel3
Show affiliationsThe correlation function of the distribution of matter in the universe shows, at large scales, baryon acoustic oscillations, which were imprinted prior to recombination. This feature was first detected in the correlation function of the luminous red galaxies of the Sloan Digital Sky Survey (SDSS). Recently, the final release (DR7) of the SDSS has been made available, and the useful volume is about two times bigger than in the old sample. We present here, for the first time, the redshift-space correlation function of this sample at large scales together with that for one shallower, but denser volume-limited subsample drawn from the Two-Degree Field Redshift Survey. We test the reliability of the detection of the acoustic peak at about 100 h –1 Mpc and the behavior of the correlation function at larger scales by means of careful estimation of errors. We confirm the presence of the peak in the latest data although broader than in previous detections.
cosmology: observations; galaxies: clusters: general; galaxies: distances and redshifts; galaxies: statistics; large-scale structure of universe
98.62.Py Distances, redshifts, radial velocities; spatial distribution of galaxies
98.62.Qz Magnitudes and colors; luminosities
95.80.+p Astronomical catalogs, atlases, sky surveys, databases, retrieval systems, archives, etc.
Issue 1 (2009 May 1)
Received 2008 December 26, accepted for publication 2009 March 25
Published 2009 April 16
An Erratum for this article has been published in 2009 ApJ 703 L184
Vicent J. Martínez et al 2009 ApJ 696 L93
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