Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-12-11
Astrophys.J.696:L93-L97,2009; Erratum-ibid.703:L184,2009
Astronomy and Astrophysics
Astrophysics
6 pages, 3 figures, 1 table. Version accepted for publication in The Astrophysical Journal Letters. Numerical values of the co
Scientific paper
10.1088/0004-637X/696/1/L93 10.1
The 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 (LRG) of the Sloan Digital Sky Survey (SDSS). The final release (DR7) of the SDSS has been recently 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 2dF redshift survey. We test the reliability of the detection of the acoustic peak at about 100 Mpc/h and the behaviour 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.
Arnalte-Mur Pablo
de la Cruz Pablo
Fernandez-Soto Alberto
Martinez Vicent J.
Paredes Silvestre
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