Bulk flow in the combined 2MTF and 6dFGSv surveys
文献类型：期刊论文
| 作者 | Qin, Fei1,2; Howlett, Cullan1,2; Staveley-Smith, Lister1,2; Hong, Tao2,3 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 477期号:4页码:5150-5166 |
| 关键词 | surveys galaxies: kinematics and dynamics galaxies: statistics large-scale structure of Universe |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/sty928 |
| 英文摘要 | We create a combined sample of 10 904 late- and early-type galaxies from the 2MTF and 6dFGSv surveys in order to accurately measure bulk flow in the local Universe. Galaxies and groups of galaxies common between the two surveys are used to verify that the difference in zero-points is <0.02 dex. We introduce a maximum likelihood estimator (eta MLE) for bulk flow measurements that allows for more accurate measurement in the presence of non-Gaussian measurement errors. To calibrate out residual biases due to the subtle interaction of selection effects, Malmquist bias and anisotropic sky distribution, the estimator is tested on mock catalogues generated from 16 independent large-scale GiggleZ and SURFS simulations. The bulk flow of the local Universe using the combined data set, corresponding to a scale size of 40 h(-1) Mpc, is 288 +/- 24 km s(-1) in the direction (l, b) = (296 +/- 6 degrees, 21 +/- 5 degrees). This is the most accurate bulk flow measurement to date, and the amplitude of the flow is consistent with the Lambda cold dark matter expectation for similar size scales. |
| WOS关键词 | H(-1) MPC SCALES ; VELOCITY POWER SPECTRUM ; GALAXY SURVEY ; PECULIAR VELOCITY ; LOCAL UNIVERSE ; COSMIC FLOWS ; FUNDAMENTAL PLANE ; K-BAND ; COSMOLOGY ; REDSHIFT |
| 资助项目 | Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)[CE110001020] ; 'Mapping Mass in the Nearby Universe with 2MASS'[GBT06A-027] ; 'Mapping Mass in the Nearby Universe with 2MASS'[GBT06B-021] ; 'Mapping Mass in the Nearby Universe with 2MASS'[GBT06C-049] ; 'Mapping Mass in the Nearby Universe with 2MASS'[GBT08B-003] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000435630100066 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; 'Mapping Mass in the Nearby Universe with 2MASS' ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; 'Mapping Mass in the Nearby Universe with 2MASS' ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; 'Mapping Mass in the Nearby Universe with 2MASS' ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) ; 'Mapping Mass in the Nearby Universe with 2MASS' |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/21948]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Qin, Fei |
| 作者单位 | 1.Univ Western Australia, Int Ctr Radio Astron Res, 35 Stirling Hwy, Crawley, WA 6009, Australia 2.ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia 3.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Fei,Howlett, Cullan,Staveley-Smith, Lister,et al. Bulk flow in the combined 2MTF and 6dFGSv surveys[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,477(4):5150-5166. |
| APA | Qin, Fei,Howlett, Cullan,Staveley-Smith, Lister,&Hong, Tao.(2018).Bulk flow in the combined 2MTF and 6dFGSv surveys.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,477(4),5150-5166. |
| MLA | Qin, Fei,et al."Bulk flow in the combined 2MTF and 6dFGSv surveys".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 477.4(2018):5150-5166. |
入库方式： OAI收割
来源：国家天文台
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