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

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

Research output: Contribution to journal › Article › peer-review

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
Journal	The Astrophysical Journal
Publication status	Accepted for publication - 21 Apr 2025

Keywords

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

Embargoed Document

2502.08186v2
Accepted author manuscript (Post-print), 3.6 MB
Due to publisher’s copyright restrictions, this document is not freely available to download from this website until: 1/01/50

Cite this

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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. ",

keywords = "astro-ph.CO, UKRI, STFC, ST/W001225/1",

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

note = "14+6 pages, 6+1 figures; version accepted to ApJ",

year = "2025",

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day = "21",

language = "English",

journal = "The Astrophysical Journal",

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TY - JOUR

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 - 2025/4/21

Y1 - 2025/4/21

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

M3 - Article

SN - 0004-637X

JO - The Astrophysical Journal

JF - The Astrophysical Journal

ER -

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

Abstract

Keywords

Embargoed Document

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