The Zeldovich approximation and wideangle redshiftspace distortions
Abstract
The contribution of lineofsight (LOS) peculiar velocities to the observed redshift of objects breaks the translational symmetry of the underlying theory, modifying the predicted twopoint functions. These `wideangle effects' have mostly been studied using linear perturbation theory in the context of the multipoles of the correlation function and power spectrum. In this article, we present the first calculation of wideangle terms in the Zeldovich approximation, which is known to be more accurate than linear theory on scales probed by the next generation of galaxy surveys. We present the exact result for dark matter and perturbatively biased tracers as well as the small angle expansion of the configuration and Fourierspace twopoint functions and the connection to the multifrequency angular power spectrum. We compare different definitions of the LOS direction and discuss how to translate between them. Lastly, we show that wideangle terms can reach tens of percent of the total signal in a measurement at low redshift in some approximations, and that a generic feature of wideangle effects is to slightly shift the Baryon Acoustic Oscillation scale.
 Authors:

 Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
 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); National Science Foundation (NSF)
 OSTI Identifier:
 1530372
 Alternate Identifier(s):
 OSTI ID: 1594732
 Grant/Contract Number:
 AC0205CH11231; SC0017860; 1713791
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Monthly Notices of the Royal Astronomical Society
 Additional Journal Information:
 Journal Volume: 479; Journal Issue: 1; Journal ID: ISSN 00358711
 Publisher:
 Royal Astronomical Society
 Country of Publication:
 United States
 Language:
 English
 Subject:
 79 ASTRONOMY AND ASTROPHYSICS; methods: analytical; cosmology: observations; cosmology: theory
Citation Formats
Castorina, Emanuele, and White, Martin. The Zeldovich approximation and wideangle redshiftspace distortions. United States: N. p., 2018.
Web. https://doi.org/10.1093/mnras/sty1437.
Castorina, Emanuele, & White, Martin. The Zeldovich approximation and wideangle redshiftspace distortions. United States. https://doi.org/10.1093/mnras/sty1437
Castorina, Emanuele, and White, Martin. Tue .
"The Zeldovich approximation and wideangle redshiftspace distortions". United States. https://doi.org/10.1093/mnras/sty1437. https://www.osti.gov/servlets/purl/1530372.
@article{osti_1530372,
title = {The Zeldovich approximation and wideangle redshiftspace distortions},
author = {Castorina, Emanuele and White, Martin},
abstractNote = {The contribution of lineofsight (LOS) peculiar velocities to the observed redshift of objects breaks the translational symmetry of the underlying theory, modifying the predicted twopoint functions. These `wideangle effects' have mostly been studied using linear perturbation theory in the context of the multipoles of the correlation function and power spectrum. In this article, we present the first calculation of wideangle terms in the Zeldovich approximation, which is known to be more accurate than linear theory on scales probed by the next generation of galaxy surveys. We present the exact result for dark matter and perturbatively biased tracers as well as the small angle expansion of the configuration and Fourierspace twopoint functions and the connection to the multifrequency angular power spectrum. We compare different definitions of the LOS direction and discuss how to translate between them. Lastly, we show that wideangle terms can reach tens of percent of the total signal in a measurement at low redshift in some approximations, and that a generic feature of wideangle effects is to slightly shift the Baryon Acoustic Oscillation scale.},
doi = {10.1093/mnras/sty1437},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 479,
place = {United States},
year = {2018},
month = {6}
}
Web of Science
Figures / Tables:
Works referencing / citing this record:
The reconstructed power spectrum in the Zeldovich approximation
journal, September 2019
 Chen, ShiFan; Vlah, Zvonimir; White, Martin
 Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 09
Erratum: The Zeldovich approximation and wideangle redshiftspace distortions
journal, September 2019
 Castorina, Emanuele; White, Martin
 Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 2
Wideangle redshiftspace distortions at quasilinear scales: crosscorrelation functions from Zel’dovich approximation
journal, November 2019
 Taruya, Atsushi; Saga, Shohei; Breton, MichelAndrès
 Monthly Notices of the Royal Astronomical Society, Vol. 491, Issue 3
Ingredients for 21 cm Intensity Mapping
journal, October 2018
 VillaescusaNavarro, Francisco; Genel, Shy; Castorina, Emanuele
 The Astrophysical Journal, Vol. 866, Issue 2
Figures / Tables found in this record: