Acoustic oscillations in the SDSS DR4 Luminous Red Galaxy sample power spectrum

Details Acoustic oscillations in the SDSS DR4 Luminous Red Galaxy sample power spectrum Acoustic oscillations in the SDSS DR4 Luminous Red Galaxy sample power spectrum

2005-12-07

arxiv.org/abs/astro-ph/0512201v1

Astron.Astrophys.449:891-902,2006

Astronomy and Astrophysics

Astrophysics

Extended version of the previous work astro-ph/0507678, now including new data from the SDSS DR4. 17 pages, 18 figures, accept

Scientific paper

10.1051/0004-6361:20053939

We calculate the redshift-space power spectrum of the Sloan Digital Sky Survey (SDSS) Data Release 4 (DR4) Luminous Red Galaxy (LRG) sample, finding evidence for a full series of acoustic features down to the scales of \sim 0.2 hMpc^{-1}. This corresponds up to the 7th peak in the CMB angular power spectrum. The acoustic scale derived, (105.4 \pm 2.3) h^{-1}Mpc, agrees very well with the ``concordance'' model prediction and also with the one determined via the analysis of the spatial two-point correlation function by Eisenstein et al. (2005). The models with baryonic features are favored by 3.3 \sigma over their ``smoothed-out'' counterparts without any oscillatory behavior.

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