arXiv 0809.45382008-09astro-ph

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

Hidenori Nomura, Kazuhiro Yamamoto, Takahiro Nishimichi

备注：: 26 pages, 13 figures; accepted for publication in JCAP; Minor changes to match published version added
发表信息：: JCAP 0810:031,2008
DOI：: 10.1088/1475-7516/2008/10/031

英文摘要：

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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