The reconstructed power spectrum in the Zeldovich approximation
Abstract
Density-reconstruction sharpens the baryon acoustic oscillations signal by undoing some of the smoothing incurred by nonlinear structure formation. In this paper we present an analytical model for reconstruction based on the Zeldovich approximation, which for the first time includes a complete set of counterterms and bias terms up to quadratic order and can fit real and redshift-space data pre- and post-reconstruction data in both Fourier and configuration space over a wide range of scales. We compare our model to n-body data at z = 0 from the DarkSky simulation [1], finding sub-percent agreement in both real space and in the redshift-space power spectrum monopole out to k = 0.4 h Mpc-1, and out to k = 0.2 h Mpc-1 in the quadrupole, with comparable agreement in configuration space. We compare our model with several popular existing alternatives, updating existing theoretical results for exponential damping in wiggle/no-wiggle splits of the BAO signal and discuss the usually-ignored effect of higher bias contributions on the reconstructed signal. In the appendices, we re-derive the former within our formalism, present exploratory results on higher-order corrections due to nonlinearities inherent to reconstruction, and present numerical techniques with which to calculate the redshift-space power spectrum of biasedmore »
- Authors:
-
- Univ. of California, Berkeley, CA (United States)
- European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1572842
- Alternate Identifier(s):
- OSTI ID: 1593666
- Grant/Contract Number:
- AC02-05CH11231; SC0017860
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Cosmology and Astroparticle Physics
- Additional Journal Information:
- Journal Volume: 2019; Journal Issue: 09; Journal ID: ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Chen, Shi-Fan, Vlah, Zvonimir, and White, Martin. The reconstructed power spectrum in the Zeldovich approximation. United States: N. p., 2019.
Web. doi:10.1088/1475-7516/2019/09/017.
Chen, Shi-Fan, Vlah, Zvonimir, & White, Martin. The reconstructed power spectrum in the Zeldovich approximation. United States. https://doi.org/10.1088/1475-7516/2019/09/017
Chen, Shi-Fan, Vlah, Zvonimir, and White, Martin. Mon .
"The reconstructed power spectrum in the Zeldovich approximation". United States. https://doi.org/10.1088/1475-7516/2019/09/017. https://www.osti.gov/servlets/purl/1572842.
@article{osti_1572842,
title = {The reconstructed power spectrum in the Zeldovich approximation},
author = {Chen, Shi-Fan and Vlah, Zvonimir and White, Martin},
abstractNote = {Density-reconstruction sharpens the baryon acoustic oscillations signal by undoing some of the smoothing incurred by nonlinear structure formation. In this paper we present an analytical model for reconstruction based on the Zeldovich approximation, which for the first time includes a complete set of counterterms and bias terms up to quadratic order and can fit real and redshift-space data pre- and post-reconstruction data in both Fourier and configuration space over a wide range of scales. We compare our model to n-body data at z = 0 from the DarkSky simulation [1], finding sub-percent agreement in both real space and in the redshift-space power spectrum monopole out to k = 0.4 h Mpc-1, and out to k = 0.2 h Mpc-1 in the quadrupole, with comparable agreement in configuration space. We compare our model with several popular existing alternatives, updating existing theoretical results for exponential damping in wiggle/no-wiggle splits of the BAO signal and discuss the usually-ignored effect of higher bias contributions on the reconstructed signal. In the appendices, we re-derive the former within our formalism, present exploratory results on higher-order corrections due to nonlinearities inherent to reconstruction, and present numerical techniques with which to calculate the redshift-space power spectrum of biased tracers within the Zeldovich approximation.},
doi = {10.1088/1475-7516/2019/09/017},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 09,
volume = 2019,
place = {United States},
year = {2019},
month = {9}
}
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