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The Enhancement of BAO in the SDSS MGS

  • H. J. Tian (a1), M. C. Neyrinck (a2), T. Budavári (a2) and A. S. Szalay (a2)

Abstract

We show that redshift-space distortions of galaxy correlations have a strong effect on correlation functions with the signature of the Baryon Acoustic Oscillations (BAO). Near the line of sight, the features become sharper as a result of redshift-space distortions. We analyze the SDSS DR7 main-galaxy sample (MGS), splitting the sample into slices 2.5 deg on the sky in various rotations. Measuring 2D correlation functions in each slice, we do see a sharp bump along the line of sight. Using Mexican-hat wavelets, we localize it to (110 ± 10) h − 1 Mpc and estimate its significance at about 4σ.

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References

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Eisenstein, D. J. et al. 2005, ApJ, 633, 560
Cole, S. et al. 2005, MNRAS, 362, 505
Strauss, M. A. et al. 2002, AJ, 124, 1810
Tian, H. J. et al. 2011, ApJ, 728, 34
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Keywords

The Enhancement of BAO in the SDSS MGS

  • H. J. Tian (a1), M. C. Neyrinck (a2), T. Budavári (a2) and A. S. Szalay (a2)

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