Constraint on the growth factor of the cosmic structure from the damping of the baryon acoustic oscillation signature

Details Constraint on the growth factor of the cosmic structure from the damping of the baryon acoustic oscillation signature Constraint on the growth factor of the cosmic structure from the damping of the baryon acoustic oscillation signature

2009-10-14

arxiv.org/abs/0910.2513v1

Phys.Rev.D80:123524,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6pages, 7 figures

Scientific paper

10.1103/PhysRevD.80.123524

We determine a constraint on the growth factor by measuring the damping of the baryon acoustic oscillations in the matter power spectrum using the Sloan Digital Sky Survey luminous red galaxy sample. The damping of the BAO is detected at the one sigma level. We obtain \sigma_8D_1(z=0.3) = 0.42^{+0.34}_{-0.28} at the 1\sigma statistical level, where \sigma_8 is the root mean square overdensity in a sphere of radius 8h^{-1}Mpc and D_1(z) is the growth factor at redshift z. The above result assumes that other parameters are fixed and the cosmology is taken to be a spatially flat cold dark matter universe with the cosmological constant.

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