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相关论文: EFAR peculiar velocities and bulk motions

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We compare infrared Tully-Fisher (TF) distances and peculiar velocities derived for spiral galaxies from the two largest datasets: the 2MASS selected Flat Galaxy Catalog, 2MFGC [19, 20] and the Arecibo General Catalog with I-band…

天体物理学 · 物理学 2009-10-02 Yu. N. Kudrya , V. E. Karachentseva , I. D. Karachentsev , S. N. Mitronova , W. K. Huchtmeier

We have obtained new Tully-Fisher (TF) peculiar velocity measurements for 52 Abell galaxy clusters distributed throughout the sky between ~ 50 and 200 Mpc/h.The measurements are based on I band photometry and optical rotation curves for a…

We analyze the peculiar velocity field for 2400 flat spiral galaxies selected from an infrared sky survey (2MFGC). The distances to the galaxies have been determined from the Tully-Fisher relation in the photometric J band with a dispersion…

天体物理学 · 物理学 2009-11-13 Yu. N. Kudrya , V. E. Karachentseva , I. D. Karachentsev , S. N. Mitronova , W. K. Huchtmeier

We compare the bulk flow of the SMAC sample to the predictions of popular cosmological models and to other recent large-scale peculiar velocity surveys. Both analyses account for aliasing of small-scale power due to the sparse and…

天体物理学 · 物理学 2007-05-23 Michael J. Hudson , Russell J. Smith , John R. Lucey , David J. Schlegel , Roger L. Davies

We have investigated the peculiar motions of clusters of galaxies in the Ursa Major (UMa) supercluster and its neighborhood. Based on SDSS (Sloan Digital Sky Survey) data, we have compiled a sample of early-type galaxies and used their…

天体物理学 · 物理学 2009-06-23 Flera G. Kopylova , Alexander I. Kopylov

We have analyzed the Fundamental Plane (FP) for a sample of 226 E and S0 galaxies in ten clusters of galaxies. For photometry in Gunn r the best fitting plane is log r_e=1.24 log sigma - 0.82 log <I>_e + cst. The scatter is 0.084 in log…

天体物理学 · 物理学 2015-06-24 Inger Jorgensen , Marijn Franx , Per Kjaergaard

A re-analysis of Lauer \& Postman's (1994; LP) finding that the Abell cluster inertial frame (ACIF), defined by the 119 Abell clusters within 15,000 km/s, is moving at almost 700 km/s with respect to the cosmic microwave background. Such a…

天体物理学 · 物理学 2016-08-30 Matthew Colless

We present the first results from the Shellflow program, an all-sky Tully-Fisher (TF) peculiar velocity survey of 276 Sb-Sc galaxies with redshifts between 4500 and 7000 km/s. Shellflow was designed to minimize systematic errors between…

天体物理学 · 物理学 2009-10-31 S. Courteau , J. A. Willick , M. A. Strauss , D. Schlegel , M. Postman

The peculiar velocity function of clusters of galaxies is determined using an accurate sample of cluster velocities based on Tully-Fisher distances of Sc galaxies (Giovanelli et al 1995b). In contrast with previous results based on samples…

天体物理学 · 物理学 2009-10-28 Neta A. Bahcall , Siang Peng Oh

We investigate the reality of large-scale streaming on scales of up to 150 Mpc using the peculiar motions of galaxies in three directions. New R-band CCD photometry and spectroscopy for elliptical galaxies is used. The Fundamental Plane…

天体物理学 · 物理学 2009-10-30 K. R. Müller , W. Freudling , R. Watkins , G. Wegner

The Tully-Fisher (Tully and Fisher 1977; TF) relation is applied to obtain peculiar velocities of field spirals galaxies and to calculate dipoles of the peculiar velocity field to cz ~ 8000 km/s. The field galaxy sample is spatially…

天体物理学 · 物理学 2009-10-30 R. Giovanelli , M. Haynes , W. Freudling , L. da Costa , J. Salzer , G. Wegner

Using the 2MASS near-infrared photometry and high signal-to-noise HI 21-cm data from the Arecibo, Green Bank, Nancay, and Parkes telescopes, we calculate the redshift-independent distances and peculiar velocities of 2,018 bright inclined…

We present an analysis of the ENEAR sample of peculiar velocities of elliptical galaxies, obtained with D_n-\sigma distances. We use the velocity correlation function to analyze the statistics of the field-object's velocities, while the…

We use Tully--Fisher distances for a sample of field late spiral galaxies to test the Lauer and Postman (1994; hereinafter LP) result suggestive of a bulk flow with respect to the Cosmic Microwave Background reference frame, of amplitude of…

We have obtained Tully-Fisher (TF) measurements for some 3000 late-type galaxies in the field and in 76 clusters distributed throughout the sky between 10 and 200\h Mpc. The cluster data are applied to the construction of an I band TF…

天体物理学 · 物理学 2007-05-23 Daniel A. Dale , Riccardo Giovanelli

We measure the bulk flow of the local Universe using the 6dF Galaxy Survey peculiar velocity sample (6dFGSv), the largest and most homogeneous peculiar velocity sample to date. 6dFGSv is a Fundamental Plane sample of $\sim10^4$ peculiar…

Monopole and dipole signatures of the peculiar velocity field as derived from the SFI sample of field spirals and the SCI and SC2 samples of cluster spirals are presented. The monopole exhibits no evidence of a `Hubble bubble' within 7000…

天体物理学 · 物理学 2007-05-23 R. Giovanelli

The Cosmicflows-2 catalogue is a compendium of peculiar velocity measurements. While it has many objects in common with the COMPOSITE catalogue, a previously analysed collection of peculiar velocity data found to give an unexpectedly large…

宇宙学与河外天体物理 · 物理学 2015-06-22 Richard Watkins , Hume A. Feldman

We give the first determination of the observed peculiar velocity distribution function for a representative sample of galaxies (within 50 Mpc (H=100) of the Local Group), which includes a wide range of clustering properties. We explore in…

天体物理学 · 物理学 2009-10-28 Somak Raychaudhury , William C. Saslaw

A large bulk flow, which is in tension with the Lambda Cold Dark Matter ($\Lambda$CDM) cosmological model, has been observed. In this paper, we provide a physically plausible explanation of this bulk flow, based on the assumption that some…

宇宙学与河外天体物理 · 物理学 2011-05-19 Yin-Zhe Ma , Christopher Gordon , Hume A. Feldman