Acoustic oscillations in the SDSS Luminous Red Galaxy sample power spectrum

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

2005-07-28

arxiv.org/abs/astro-ph/0507678v1

Astronomy and Astrophysics

Astrophysics

7 pages, 9 figures, A&A submitted

Scientific paper

We calculate the redshift-space power spectrum of the Sloan Digital Sky Survey (SDSS) Luminous Red Galaxy (LRG) sample, finding evidence for a full series of acoustic features down to the scales of ~0.25 h Mpc^{-1}. This corresponds up to the 9. peak in the CMB angular power spectrum. The acoustic scale derived, (107.8 +- 4.3) h^{-1}Mpc (k < 0.2 h Mpc^{-1}), 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). This is not only an independent confirmation of Eisenstein et al.(2005) results made with different methods and software but also, according to our knowledge, the first determination of the power spectrum of the SDSS LRG sample. By calculating the two-point correlation function using the smooth cubic spline model fitted to the observed bandpowers and comparing with the results of the direct determination we demonstrate the consistency of our results.

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