A new consistency test for ΛCDM cosmology using galaxy surveys

Jinglan Zheng; Gong-Bo Zhao; Yuting Wang; Xiaoyong Mu; Ruiyang Zhao; Weibing Zhang; Shuo Yuan; David Bacon; Kazuya Koyama

doi:10.1088/1674-4527/ac69b8

A new consistency test for ΛCDM cosmology using galaxy surveys

Jinglan Zheng, Gong-Bo Zhao, Yuting Wang, Xiaoyong Mu, Ruiyang Zhao, Weibing Zhang, Shuo Yuan, David Bacon, Kazuya Koyama

Institute of Cosmology & Gravitation

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

53 Downloads (Pure)

Abstract

We propose a new consistency test for the ΛCDM cosmology using baryonic acoustic oscillations (BAO) and redshift space distortion (RSD) measurements from galaxy redshift surveys. Specifically, we determine the peak position of ƒσ ₈(z) in redshift z offered by a RSD measurement, and compare it to the one predicted by the BAO observables assuming a flat ΛCDM cosmology. We demonstrate this new test using the simulated data for the DESI galaxy survey, and argue that this test complements those using the background observables alone, and is less subject to systematics in the RSD analysis, compared to traditional methods using values of ƒσ ₈(z) directly.

Original language	English
Article number	065016
Number of pages	7
Journal	Research in Astronomy and Astrophysics
Volume	22
Issue number	6
DOIs	https://doi.org/10.1088/1674-4527/ac69b8
Publication status	Published - 26 May 2022

Keywords

Cosmology
(cosmology:) dark energy
galaxies: distances and redshifts
UKRI
STFC

Access to Document

10.1088/1674-4527/ac69b8

2204.12647v2
This Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period provided that all the terms and conditions of the licence are adhered to.
Accepted author manuscript (Post-print), 1.02 MBLicence: CC BY-NC-ND

Cite this

@article{2e9b162e11e44b84a6da10cdb357098b,

title = "A new consistency test for ΛCDM cosmology using galaxy surveys",

abstract = "We propose a new consistency test for the ΛCDM cosmology using baryonic acoustic oscillations (BAO) and redshift space distortion (RSD) measurements from galaxy redshift surveys. Specifically, we determine the peak position of ƒσ 8(z) in redshift z offered by a RSD measurement, and compare it to the one predicted by the BAO observables assuming a flat ΛCDM cosmology. We demonstrate this new test using the simulated data for the DESI galaxy survey, and argue that this test complements those using the background observables alone, and is less subject to systematics in the RSD analysis, compared to traditional methods using values of ƒσ 8(z) directly.",

keywords = "Cosmology, (cosmology:) dark energy, galaxies: distances and redshifts, UKRI, STFC",

author = "Jinglan Zheng and Gong-Bo Zhao and Yuting Wang and Xiaoyong Mu and Ruiyang Zhao and Weibing Zhang and Shuo Yuan and David Bacon and Kazuya Koyama",

note = "9 pages, 6 figures; accepted to Research in Astronomy and Astrophysics (RAA). 12 month embargo. This Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period provided that all the terms and conditions of the licence are adhered to.",

year = "2022",

month = may,

day = "26",

doi = "10.1088/1674-4527/ac69b8",

language = "English",

volume = "22",

journal = "Research in Astronomy and Astrophysics",

issn = "1674-4527",

publisher = "IOP Publishing",

number = "6",

}

TY - JOUR

T1 - A new consistency test for ΛCDM cosmology using galaxy surveys

AU - Zheng, Jinglan

AU - Zhao, Gong-Bo

AU - Wang, Yuting

AU - Mu, Xiaoyong

AU - Zhao, Ruiyang

AU - Zhang, Weibing

AU - Yuan, Shuo

AU - Bacon, David

AU - Koyama, Kazuya

N1 - 9 pages, 6 figures; accepted to Research in Astronomy and Astrophysics (RAA). 12 month embargo. This Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period provided that all the terms and conditions of the licence are adhered to.

PY - 2022/5/26

Y1 - 2022/5/26

N2 - We propose a new consistency test for the ΛCDM cosmology using baryonic acoustic oscillations (BAO) and redshift space distortion (RSD) measurements from galaxy redshift surveys. Specifically, we determine the peak position of ƒσ 8(z) in redshift z offered by a RSD measurement, and compare it to the one predicted by the BAO observables assuming a flat ΛCDM cosmology. We demonstrate this new test using the simulated data for the DESI galaxy survey, and argue that this test complements those using the background observables alone, and is less subject to systematics in the RSD analysis, compared to traditional methods using values of ƒσ 8(z) directly.

AB - We propose a new consistency test for the ΛCDM cosmology using baryonic acoustic oscillations (BAO) and redshift space distortion (RSD) measurements from galaxy redshift surveys. Specifically, we determine the peak position of ƒσ 8(z) in redshift z offered by a RSD measurement, and compare it to the one predicted by the BAO observables assuming a flat ΛCDM cosmology. We demonstrate this new test using the simulated data for the DESI galaxy survey, and argue that this test complements those using the background observables alone, and is less subject to systematics in the RSD analysis, compared to traditional methods using values of ƒσ 8(z) directly.

KW - Cosmology

KW - (cosmology:) dark energy

KW - galaxies: distances and redshifts

KW - UKRI

KW - STFC

UR - https://doi.org/10.48550/arXiv.2204.12647

U2 - 10.1088/1674-4527/ac69b8

DO - 10.1088/1674-4527/ac69b8

M3 - Article

SN - 1674-4527

VL - 22

JO - Research in Astronomy and Astrophysics

JF - Research in Astronomy and Astrophysics

IS - 6

M1 - 065016

ER -

A new consistency test for ΛCDM cosmology using galaxy surveys

Abstract

Keywords

Access to Document

Fingerprint

Cite this