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2MTF-VI. Measuring the velocity power spectrum
Howlett, Cullan1,2; Staveley-Smith, Lister1,2; Elahi, Pascal J.1,2; Hong, Tao2,3; Jarrett, Tom H.4; Jones, D. Heath5; Koribalski, Barbel S.6; Macri, Lucas M.7; Masters, Karen L.8; Springob, Christopher M.1,2
2017-11-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号471期号:3页码:3135-3151
摘要We present measurements of the velocity power spectrum and constraints on the growth rate of structure f sigma(8), at redshift zero, using the peculiar motions of 2062 galaxies in the completed 2MASS Tully-Fisher survey (2MTF). To accomplish this we introduce a model for fitting the velocity power spectrum including the effects of non-linear redshift space distortions (RSD), allowing us to recover unbiased fits down to scales k= 0.2 h Mpc(-1) without the need to smooth or grid the data. Our fitting methods are validated using a set of simulated 2MTF surveys. Using these simulations we also identify that the Gaussian distributed estimator for peculiar velocities of Watkins & Feldman is suitable for measuring the velocity power spectrum, but sub-optimal for the 2MTF data compared to using magnitude fluctuations delta m, and that, whilst our fits are robust to a change in fiducial cosmology, future peculiar velocity surveys with more constraining power may have to marginalize over this. We obtain scale-dependent constraints on the growth rate of structure in two bins, finding f sigma(8) = [0.55(-0.13)(+0.16), 0.40(-0.17)(+0.16)] in the ranges k = [0.007-0.055, 0.55-0.150] h Mpc(-)1. We also find consistent results using four bins. Assuming scale-independence we find a value f sigma(8) = 0.51(-0.08)(+0.09), a similar to 16 per cent measurement of the growth rate. Performing a consistency check of general relativity (GR) and combining our results with cosmic microwave background data only we find gamma = 0.45(-0.11)(+0.10), a remarkable constraint considering the small number of galaxies. All of our results are completely independent of the effects of galaxy bias, and fully consistent with the predictions of GR (scale-independent f sigma(8) and gamma approximate to 0.55).
文章类型Article
关键词Cosmological Parameters Large-scale Structure Of Universe Cosmology: Observations
WOS标题词Science & Technology ; Physical Sciences
资助者Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth ; (GBT06A-027) ; (GBT06A-027) ; (GBT06B-021) ; (GBT06B-021) ; (GBT06C-049) ; (GBT06C-049) ; (GBT08B-003) ; (GBT08B-003) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth ; (GBT06A-027) ; (GBT06A-027) ; (GBT06B-021) ; (GBT06B-021) ; (GBT06C-049) ; (GBT06C-049) ; (GBT08B-003) ; (GBT08B-003)
DOI10.1093/mnras/stx1521
关键词[WOS]2MASS REDSHIFT SURVEY ; COLD DARK-MATTER ; LARGE-SCALE STRUCTURE ; TULLY-FISHER CATALOG ; PECULIAR VELOCITIES ; BULK FLOW ; COSMOLOGICAL PARAMETERS ; LUMINOSITY FUNCTION ; SPACE DISTORTIONS ; ELLIPTIC GALAXIES
收录类别SCI
语种英语
资助者Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth ; (GBT06A-027) ; (GBT06A-027) ; (GBT06B-021) ; (GBT06B-021) ; (GBT06C-049) ; (GBT06C-049) ; (GBT08B-003) ; (GBT08B-003) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)(CE110001020) ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth ; (GBT06A-027) ; (GBT06A-027) ; (GBT06B-021) ; (GBT06B-021) ; (GBT06C-049) ; (GBT06C-049) ; (GBT08B-003) ; (GBT08B-003)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000409035700046
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20091
专题射电天文研究部
作者单位1.Univ Western Australia, Int Ctr Radio Astron Res, Crawley, WA 6009, Australia
2.Univ Western Australia, ARC Ctr Excellence All Sky Astrophys CAASTRO, Nedlands, WA, Australia
3.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
4.Univ Cape Town, Astron Dept, Private Bag X3, ZA-7701 Rondebosch, South Africa
5.Univ Newcastle, English Language & Fdn Studies Ctr, Callaghan, NSW 2308, Australia
6.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia
7.Texas A&M Univ, Dept Phys & Astron, George P & Cynthia Woods Mitchell Inst Fundamenta, 4242 TAMU, College Stn, TX 77843 USA
8.Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg, Portsmouth PO1 3FX, Hants, England
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Howlett, Cullan,Staveley-Smith, Lister,Elahi, Pascal J.,et al. 2MTF-VI. Measuring the velocity power spectrum[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,471(3):3135-3151.
APA Howlett, Cullan.,Staveley-Smith, Lister.,Elahi, Pascal J..,Hong, Tao.,Jarrett, Tom H..,...&Springob, Christopher M..(2017).2MTF-VI. Measuring the velocity power spectrum.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,471(3),3135-3151.
MLA Howlett, Cullan,et al."2MTF-VI. Measuring the velocity power spectrum".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 471.3(2017):3135-3151.
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