Measuring the redshift-space distortions by cross-correlating the density fields before and after reconstruction

Weibing Zhang; Ruiyang Zhao; Xiaoyong Mu; Kazuya Koyama; Ryuichi Takahashi; Yuting Wang; Gong-Bo Zhao

doi:10.3847/1538-4357/adcf21

Measuring the redshift-space distortions by cross-correlating the density fields before and after reconstruction

Weibing Zhang, Ruiyang Zhao, Xiaoyong Mu, Kazuya Koyama, Ryuichi Takahashi, Yuting Wang, Gong-Bo Zhao

Institute of Cosmology & Gravitation

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Abstract

In this work, we develop a theoretical model for the cross-power spectrum of the galaxy density field before and after standard baryonic acoustic oscillation (BAO) reconstruction. Using this model, we extract the redshift-space distortion (RSD) parameter from the cross-power spectrum. The model is validated against a suite of high-resolution $N$-body simulations, demonstrating its accuracy and robustness for cosmological analyses.

Original language	English
Article number	218
Number of pages	15
Journal	The Astrophysical Journal
Volume	985
DOIs	https://doi.org/10.3847/1538-4357/adcf21
Publication status	Published - 27 May 2025

Keywords

astro-ph.CO
UKRI
STFC
ST/W001225/1

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10.3847/1538-4357/adcf21

Measuring the redshift-space distortionsFinal published version, 1.38 MBLicence: CC BY

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title = "Measuring the redshift-space distortions by cross-correlating the density fields before and after reconstruction",

abstract = "In this work, we develop a theoretical model for the cross-power spectrum of the galaxy density field before and after standard baryonic acoustic oscillation (BAO) reconstruction. Using this model, we extract the redshift-space distortion (RSD) parameter from the cross-power spectrum. The model is validated against a suite of high-resolution \$N\$-body simulations, demonstrating its accuracy and robustness for cosmological analyses. ",

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author = "Weibing Zhang and Ruiyang Zhao and Xiaoyong Mu and Kazuya Koyama and Ryuichi Takahashi and Yuting Wang and Gong-Bo Zhao",

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T1 - Measuring the redshift-space distortions by cross-correlating the density fields before and after reconstruction

AU - Zhang, Weibing

AU - Zhao, Ruiyang

AU - Mu, Xiaoyong

AU - Koyama, Kazuya

AU - Takahashi, Ryuichi

AU - Wang, Yuting

AU - Zhao, Gong-Bo

N1 - 14+6 pages, 6+1 figures; version accepted to ApJ

PY - 2025/5/27

Y1 - 2025/5/27

N2 - In this work, we develop a theoretical model for the cross-power spectrum of the galaxy density field before and after standard baryonic acoustic oscillation (BAO) reconstruction. Using this model, we extract the redshift-space distortion (RSD) parameter from the cross-power spectrum. The model is validated against a suite of high-resolution $N$-body simulations, demonstrating its accuracy and robustness for cosmological analyses.

AB - In this work, we develop a theoretical model for the cross-power spectrum of the galaxy density field before and after standard baryonic acoustic oscillation (BAO) reconstruction. Using this model, we extract the redshift-space distortion (RSD) parameter from the cross-power spectrum. The model is validated against a suite of high-resolution $N$-body simulations, demonstrating its accuracy and robustness for cosmological analyses.

KW - astro-ph.CO

KW - UKRI

KW - STFC

KW - ST/W001225/1

U2 - 10.3847/1538-4357/adcf21

DO - 10.3847/1538-4357/adcf21

M3 - Article

SN - 0004-637X

VL - 985

JO - The Astrophysical Journal

JF - The Astrophysical Journal

M1 - 218

ER -

Measuring the redshift-space distortions by cross-correlating the density fields before and after reconstruction

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Keywords

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