Testing anisotropic Hubble expansion

doi:10.1088/1475-7516/2025/03/066

2025-03-26

Matthew Colless

Khaled Said

L. Staveley‐Smith

DOI：10.1088/1475-7516/2025/03/066

原文链接

原文求助

摘要

En 中文

宇宙学原理断言宇宙在大尺度上的均匀性，是标准宇宙学模型的一个可检验的假设。我们通过测量来自Tully-Fisher距离估计器微分零点测量的Hubble常数H0的方向变化，来探索对各向异性膨胀的限制。我们使用全天空Cosmicflows-4目录中的Tully-Fisher数据集，拟合了H0方向变化的多种模型。最佳拟合的偶极变化在方向(& ell;, b) = (142 +/- 30 degrees,52 +/- 10 degrees)上的振幅为0.063 +/- 0.016 mag。如果这是由于各向异性膨胀引起的，那么它意味着H0有3%的变化（即ΔH0 = 2.10 +/- 0.53 km s-1 Mpc-1，若H0 = 70 km s-1 Mpc-1），显著性为3.9σ。一个包含H0偶极的模型相对于一个具有恒定H0和与标准Lambda CDM宇宙学一致的Cosmicflows-4采样体积的整体运动的模型，仅表现出微弱的偏好。然而，我们通过模拟表明，来自WALLABY和DESI调查的预期Tully-Fisher数据应该能够在5.8σ置信度下检测到1%的H0偶极各向异性，并区分它与Lambda CDM预测的这些调查体积内的典型整体流动。

Keyword:

cosmic flows

galaxy surveys

期刊

Journal of Cosmology and Astroparticle Physics

IF:

5.9

论文数:

1.3W

被引数:

4.7W

机构

ozgrav arc ctr excellence gravitat wave discovery

学者数:

论文数: 10

被引数: 7

Australian Natl Univ

学者数:

865

论文数: 494

被引数: 212

Univ Western Australia

学者数:

1.0K

论文数: 720

被引数: 232

查看更多机构

引用论文

Astropy: A community Python package for astronomy Astropy: 一个用于天文学的社区Python包

ASTRONOMY & ASTROPHYSICS

IF5.8

2013-09-30

9.5K

OAAI

Robitaille, Thomas P.; Tollerud, Erik J.; Greenfield, Perry; Droettboom, Michael; Bray, Erik; Aldcroft, Tom; Davis, Matt; Ginsburg, Adam; Price-Whelan, Adrian M.; Kerzendorf, Wolfgang E.; Conley, Alexander; Crighton, Neil; Barbary, Kyle; Muna, Demitri; Ferguson, Henry; Grollier, Frederic; Parikh, Madhura M.; Nair, Prasanth H.; Guenther, Hans M.; Deil, Christoph; Woillez, Julien; Conseil, Simon; Kramer, Roban; Turner, James E. H.; Singer, Leo; Fox, Ryan; Weaver, Benjamin A.; Zabalza, Victor; Edwards, Zachary I.; Bostroem, K. Azalee; Burke, D. J.; Casey, Andrew R.; Crawford, Steven M.; Dencheva, Nadia; Ely, Justin; Jenness, Tim; Labrie, Kathleen; Lim, Pey Lian; Pierfederici, Francesco; Pontzen, Andrew; Ptak, Andy; Refsdal, Brian; Servillat, Mathieu; Streicher, Ole

Effective volume of supernovae samples and sample variance 超新星样本的有效体积和样本方差

Physical Review D

IF0

2024-03-14

OAAI

Zhongxu Zhai; Will J. Percival; Zhejie Ding

An effective description of Laniakea: impact on cosmology and the local determination of the Hubble constant

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

IF5.9

2024-01-31

OAAI

Giani, Leonardo; Howlett, Cullan; Said, Khaled; Davis, Tamara; Vagnozzi, Sunny

Global Attenuation in Spiral Galaxies in Optical and Infrared Bands

ASTROPHYSICAL JOURNAL

IF5.4

2019-10-14

OAAI

Kourkchi, Ehsan; Tully, R. Brent; Neill, J. Don; Seibert, Mark; Courtois, Helene M.; Dupuy, Alexandra

An improved Tully-Fisher estimate of H0

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

IF4.8

2024-08-08

OAAI

Boubel, Paula; Colless, Matthew; Said, Khaled; Staveley-Smith, Lister

Type Ia supernovae, evolution, and the cosmological constant

ASTROPHYSICAL JOURNAL

IF5.4

2000-02-20

131

OAAI

Drell, PS; Loredo, TJ; Wasserman, I

Hints of FLRW breakdown from supernovae

Physical Review D

IF0

2022-03-11

OAAI

Chethan Krishnan; Roya Mohayaee; Eoin Ó Colgáin; M. M. Sheikh-Jabbari; Lu Yin

WALLABY pilot survey: Public release of H i data for almost 600 galaxies from phase 1 of ASKAP pilot observations

Publications of the Astronomical Society of Australia

IF0

2022-11-15

OAAI

T. Westmeier; N. Deg; K. Spekkens; T. N. Reynolds; A. X. Shen; S. Gaudet; S. Goliath; M. T. Huynh; P. Venkataraman; X. Lin; T. O’Beirne; B. Catinella; L. Cortese; H. Dénes; A. Elagali; B.-Q. For; G. I. G. Józsa; C. Howlett; J. M. van der Hulst; R. J. Jurek; P. Kamphuis; V. A. Kilborn; D. Kleiner; B. S. Koribalski; K. Lee-Waddell; C. Murugeshan; J. Rhee; P. Serra; L. Shao; L. Staveley-Smith; J. Wang; O. I. Wong; M. A. Zwaan; J. R. Allison; C. S. Anderson; Lewis Ball; D. C.-J. Bock; D. Brodrick; J. D. Bunton; F. R. Cooray; N. Gupta; D. B. Hayman; E. K. Mahony; V. A. Moss; A. Ng; S. E. Pearce; W. Raja; D. N. Roxby; M. A. Voronkov; K. A. Warhurst; H. M. Courtois; K. Said

Sample variance in the local measurements of the Hubble constant

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

IF4.8

2017-08-02

OAAI

Wu, Hao-Yi; Huterer, Dragan

Cosmicflows-4: The Catalog of ∼10,000 Tully-Fisher Distances

ASTROPHYSICAL JOURNAL

IF5.4

2020-10-23

OAAI

Kourkchi, Ehsan; Tully, R. Brent; Eftekharzadeh, Sarah; Llop, Jordan; Courtois, Helene M.; Guinet, Daniel; Dupuy, Alexandra; Neill, James D.; Seibert, Mark; Andrews, Michael; Chuang, Juana; Danesh, Arash; Gonzalez, Randy; Holthaus, Alexandria; Mokelke, Amber; Schoen, Devin; Urasaki, Chase

查看更多内容