2MTF-V. Cosmography, beta, and the residual bulk flow
文献类型：期刊论文
| 作者 | Springob, Christopher M.1,2; Hong, Tao1,2,3 ; Staveley-Smith, Lister1,2; Masters, Karen L.4,5; Macri, Lucas M.6; Koribalski, Baerbel S.7; Jones, D. Heath8; Jarrett, Tom H.9; Magoulas, Christina9; Erdogdu, Pirin10
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2016-02-21 |
| 卷号 | 456期号:2页码:1886-1900 |
| 关键词 | galaxies: distances and redshifts galaxies: fundamental parameters galaxies: spiral distance scale large-scale structure of Universe |
| 英文摘要 | Using the Tully-Fisher relation, we derive peculiar velocities for the 2MASS Tully-Fisher survey and describe the velocity field of the nearby Universe. We use adaptive kernel smoothing to map the velocity field, and compare it to reconstructions based on the redshift space galaxy distributions of the 2MASS Redshift Survey (2MRS) and the IRAS Point Source Catalog Redshift Survey (PSCz). With a standard chi(2) minimization fit to the models, we find that the PSCz model provides a better fit to the 2MTF velocity field data than does the 2MRS model, and provides a value of beta in greater agreement with literature values. However, when we subtract away the monopole deviation in the velocity zero-point between data and model, the 2MRS model also produces a value of beta in agreement with literature values. We also calculate the 'residual bulk flow': the component of the bulk flow not accounted for by the models. This is similar to 250 km s(-1) when performing the standard fit, but drops to similar to 150 km s(-1) for both models when the aforementioned monopole offset between data and models is removed. This smaller number is more in line with theoretical expectations, and suggests that the models largely account for the major structures in the nearby Universe responsible for the bulk velocity. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000372264200053 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5348]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Univ Western Australia, Int Ctr Radio Astron Res, Crawley, WA 6009, Australia 2.ARC Ctr Excellence All Sky Astrophys CAASTRO, Crawley, WA 6009, Australia 3.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 4.Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg,Burnaby Rd, Portsmouth PO1 3FX, Hants, England 5.South East Phys Network, Portsmouth PO1 3FX, Hants, England 6.Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, Dept Phys & Astron, 4242 TAMU, College Stn, TX 77843 USA 7.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia 8.Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia 9.Univ Cape Town, Dept Astron, Private Bag X3, ZA-7701 Rondebosch, South Africa 10.Australian Coll Kuwait, POB 1411, Safat 13015, Kuwait |
| 推荐引用方式 GB/T 7714 | Springob, Christopher M.,Hong, Tao,Staveley-Smith, Lister,et al. 2MTF-V. Cosmography, beta, and the residual bulk flow[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,456(2):1886-1900. |
| APA | Springob, Christopher M..,Hong, Tao.,Staveley-Smith, Lister.,Masters, Karen L..,Macri, Lucas M..,...&Erdogdu, Pirin.(2016).2MTF-V. Cosmography, beta, and the residual bulk flow.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,456(2),1886-1900. |
| MLA | Springob, Christopher M.,et al."2MTF-V. Cosmography, beta, and the residual bulk flow".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 456.2(2016):1886-1900. |
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来源：国家天文台
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