2013/01/31 by Geraint Pratten, G. Pratten, D. Munshi +1 · 22 citations
Environmental Science · Physics and Astronomy · #Astrophysics #Baryon acoustic oscillations #Classical mechanics #Climate variability and models #Cosmic microwave background #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Galaxy #Matter power spectrum #Physics #Quantum mechanics #Redshift #Redshift survey #Redshift-space distortions #Spectral density #Theoretical physics #astro-ph.CO
paper · pdf · doi:10.1093/mnras/stt1854
published in Monthly Notices of the Royal Astronomical Society 436(4), 3792-3808 (Oxford University Press) · 19 pages, 13 figures. Accepted for publication in MNRAS
arxiv created 2013/09/30 · openalex publication_date 2013/10/30 · arxiv updated 2014/01/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The baryon acoustic oscillations (BAOs) are features in the matter power spectrum on scales of the order of 100–150 h−1 Mpc that promise to be a powerful tool to constrain and test cosmological models. The BAO have attracted such attention that future upcoming surveys have been designed with the BAO at the forefront of the primary science goals. Recent studies have advocated the use of a spherical Fourier–Bessel (sFB) expansion for future wide-field surveys that cover both wide and deep regions of the sky necessitating the simultaneous treatment of the spherical sky geometry as well as the extended radial coverage. Ignoring the possible effects of growth, which is not expected to be significant at low redshifts, we present an extended analysis of the BAO's using the sFB formalism by taking into account the role of non-linearities and linear redshift distortions in the oscillations observed in the galaxy power spectrum. The sFB power spectrum has both radial and tangential dependence and it has been shown that in the limit that we approach a deep survey, the sFB power spectrum is purely radial and collapses to the Cartesian Fourier power spectrum. This radialization of information is shown to hold even in the presence of redshift space distortions and one-loop corrections to the galaxy power spectrum albeit with modified tangential and radial dependence. As per previous studies, we find that the introduction of non-linearities leads to a damping of the oscillations in the matter power spectrum.