6533b7cffe1ef96bd1259a12

RESEARCH PRODUCT

RELIABILITY OF THE DETECTION OF THE BARYON ACOUSTIC PEAK

Enn SaarSilvestre ParedesPablo De La CruzMaría Jesús Pons-borderíaVicent J. MartínezElmo TempelPablo Arnalte-murAlberto Fernández-soto

subject

Physicsmedia_common.quotation_subjectAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsCorrelation function (astronomy)AstrophysicsRedshift surveyGalaxyRedshiftBaryonDistribution (mathematics)Space and Planetary ScienceSkyBaryon acoustic oscillationsAstrophysics::Galaxy Astrophysicsmedia_common

description

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.

https://doi.org/10.1088/0004-637x/696/1/l93