NONLINEAR BEHAVIOR OF BARYON ACOUSTIC OSCILLATIONS IN REDSHIFT SPACE FROM THE ZEL'DOVICH APPROXIMATION

Journal Article · Sat Jan 10 04:00:00 EST 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/798/2/137· OSTI ID:22364619

McCullagh, Nuala; Szalay, Alexander S. ^[1]

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1. The Johns Hopkins University, Baltimore, MD 21218 (United States)

Baryon acoustic oscillations (BAO) are a powerful probe of the expansion history of the universe, which can tell us about the nature of dark energy. In order to accurately characterize the dark energy equation of state using BAO, we must understand the effects of both nonlinearities and redshift space distortions on the location and shape of the acoustic peak. In a previous paper, we introduced a novel approach to second order perturbation theory in configuration space using the Zel'dovich approximation, and presented a simple result for the first nonlinear term of the correlation function. In this paper, we extend this approach to redshift space. We show how to perform the computation and present the analytic result for the first nonlinear term in the correlation function. Finally, we validate our result through comparison with numerical simulations.

• OSTI ID: 22364619
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 798; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
APPROXIMATIONS
BARYONS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CORRELATION FUNCTIONS
COSMOLOGY
EQUATIONS OF STATE
NONLINEAR PROBLEMS
NONLUMINOUS MATTER
OSCILLATIONS
PROBES
RED SHIFT
SPACE
UNIVERSE