中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 国家天文台
  3. 中国科学院国家天文台
Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3

文献类型：期刊论文

作者Qin, Fei4,5; Howlett, Cullan4,5; Staveley-Smith, Lister2,4; Hong, Tao1,3,5
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期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
DOI10.1093/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.
WOS关键词H(-1) MPC SCALES ; PECULIAR VELOCITY ; COSMIC FLOWS ; TULLY-FISHER ; GALAXIES ; QUADRUPOLE ; FIELD
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研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000454578700035
出版者OXFORD UNIV PRESS
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)
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.

入库方式： OAI收割

来源：国家天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。