Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3

doi:10.1093/mnras/sty2826

CORC > 国家天文台 > 中国科学院国家天文台

	Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3
	Qin, Fei 4,5; Howlett, Cullan 4,5; Staveley-Smith, Lister 2,4; Hong, Tao 1,3,5
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019
卷号	482 期号:2 页码:1920-1930
关键词	surveys galaxies: statistics large-scale structure of Universe cosmology: observations
ISSN号	0035-8711
DOI	10.1093/mnras/sty2826
英文摘要	The low-order kinematic moments of galaxies, namely bulk flow and shear, enables us to test whether theoretical models can accurately describe the evolution of the mass density field in the nearby Universe. We use the so-called eta MLE maximum likelihood estimator in log-distance space to measure thesemoments from a combined sample of the 2MASS Tully-Fisher (2MTF) survey and the COSMICFLOWS-3 (CF3) compilation. Galaxies common between 2MTF and CF3 demonstrate a small zero-point difference of -0.016 +/- 0.002 dex. We test the eta MLE on 16 mock 2MTF survey catalogues in order to explore how well the eta MLE recovers the true moments, and the effect of sample anisotropy. On the scale size of 37 h(-1) Mpc, we find that the bulk flow of the local Universe is 259 +/- 15 km s(-1) in the direction is (l, b) = (300 +/- 4 degrees, 23 +/- 3.) (Galactic coordinates). The average shear amplitude is 1.7 +/- 0.4 h km s(-1) Mpc(-1). We use a variable window function to explore the bulk and shear moments as a function of depth. In all cases, the measurements are consistent with the predictions of the Lambda cold dark matter (Lambda CDM) model.
资助项目	China Scholarship Council (CSC) ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)[CE110001020] ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)[CE170100013]
WOS关键词	H(-1) MPC SCALES ; PECULIAR VELOCITY ; COSMIC FLOWS ; TULLY-FISHER ; GALAXIES ; QUADRUPOLE ; FIELD
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000454578700035
资助机构	China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24291]
专题	中国科学院国家天文台
通讯作者	Qin, Fei
作者单位	1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China 2.ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Sydney, NSW, Australia 3.Chinese Acad Sci, CAS Key Lab FAST, Natl Astron Observ, Beijing, Peoples R China 4.Univ Western Australia, ICRAR, 35 Stirling Hwy, Crawley, WA 6009, Australia 5.ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW 2006, Australia
推荐引用方式 GB/T 7714	Qin, Fei,Howlett, Cullan,Staveley-Smith, Lister,et al. Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,482(2):1920-1930.
APA	Qin, Fei,Howlett, Cullan,Staveley-Smith, Lister,&Hong, Tao.(2019).Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,482(2),1920-1930.
MLA	Qin, Fei,et al."Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482.2(2019):1920-1930.