Damping of the baryon acoustic oscillations in the matter power spectrum as a probe of the growth factor

Details Damping of the baryon acoustic oscillations in the matter power spectrum as a probe of the growth factor Damping of the baryon acoustic oscillations in the matter power spectrum as a probe of the growth factor

2008-09-26

arxiv.org/abs/0809.4538v2

JCAP10(2008)031

Astronomy and Astrophysics

Astrophysics

26 pages, 13 figures; accepted for publication in JCAP; Minor changes to match published version added

Scientific paper

10.1088/1475-7516/2008/10/031

We investigate the damping of the baryon acoustic oscillations (BAO) signature in the matter power spectrum due to the quasi-nonlinear clustering of density perturbations. On the basis of the third order perturbation theory, we construct a fitting formula of the damping in an analytic way. This demonstrates that the damping is closely related with the growth factor and the amplitude of the matter power spectrum. Then, we investigate the feasibility of constraining the growth factor through a measurement of the damping of the BAO signature. An extension of our formula including higher order corrections of density perturbations is also discussed.

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