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The Enhancement of BAO in the SDSS MGS

Published online by Cambridge University Press:  17 August 2016

H. J. Tian ,
M. C. Neyrinck ,
T. Budavári  and
A. S. Szalay
H. J. Tian
Affiliation:
China Three Gorges University, Yichang, 443002, China; hjtian@lamost.org
M. C. Neyrinck
Affiliation:
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218
T. Budavári
Affiliation:
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218
A. S. Szalay
Affiliation:
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218
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Abstract

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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.

Keywords

cosmology: large-scale structure of Universe - methods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S319: Galaxies at High Redshift and Their Evolution Over Cosmic Time , August 2015 , pp. 145
Copyright
Copyright © International Astronomical Union 2016 

References

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