338 citations · 1.7k across the 35 of their papers we have counts for
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Consistently Large Cosmic Flows on Scales of 100 Mpc/h: a Challenge for the Standard LCDM Cosmology
Richard Watkins, Hume A. Feldman, Michael J. Hudson
Peculiar velocity surveys have non-uniform spatial distributions of tracers, so that the bulk flow estimated from them does not correspond to that of a simple volume such as a sphe…
Cosmic Flows on 100 Mpc/h scales
Hume A. Feldman, Michael J. Hudson, Richard Watkins
To study galactic motions on the largest available scales, we require bulk flow moments whose window functions have as narrow a peak as possible and having as small an amplitude as…
Bulk Flow and Shear Moments of the SFI++ Survey
Hume A. Feldman, Richard Watkins
We find the nine bulk--flow and shear moments from the SFI++ survey, as well as for subsamples of group and field galaxies. We constrain the velocity power spectrum shape parameter…
Power Spectrum Shape from Peculiar Velocity Data
Richard Watkins, Hume A. Feldman
We constrain the velocity power spectrum shape parameter in linear theory using the nine bulk-flow and shear moments estimated from four recent peculiar velocity surveys. For e…
Current Status Of Velocity Field Surveys: A Consistency Check
Devdeep Sarkar, Hume A. Feldman, Richard Watkins
We present an analysis comparing the bulk--flow measurements for six recent peculiar velocity surveys, namely, ENEAR, SFI, RFGC, SBF and the Mark III singles and group catalogs. We…
Optimal Moments for Velocity Fields Analysis
Hume A Feldman, Richard Watkins, Adrian Melott +1
We describe a new method of overcoming problems inherent in peculiar velocity surveys by using data compression as a filter with which to separate large-scale, linear flows from sm…
Optimal Moments for the Analysis of Peculiar Velocity Surveys II: Testing
Hume A. Feldman, Richard Watkins, Adrian L. Melott +1
Analyses of peculiar velocity surveys face several challenges, including low signal--to--noise in individual velocity measurements and the presence of small--scale, nonlinear flows…
Optimal Moments for the Analysis of Peculiar Velocity Surveys
Richard Watkins, Hume A. Feldman, Scott W. Chambers +2
We present a new method for the analysis of peculiar velocity surveys which removes contributions to velocities from small scale, nonlinear velocity modes while retaining informati…
Flows on scales of 150 Mpc?
K. R. Müller, W. Freudling, R. Watkins +1
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 spectroscop…
The RMS Peculiar Velocity of Clusters
Richard Watkins
We study the rms peculiar velocity of clusters as a convenient statistic to put constraints on cosmological models. This statistic is easy to compute theoretically given a model fo…
A New Approach to Probing Large Scale Power with Peculiar Velocities
Hume A. Feldman, Richard Watkins
We propose a new strategy to probe the power spectrum on large scales using galaxy peculiar velocities. We explore the properties of surveys that cover only two small fields in opp…
Linear Graviational Instability of Filamentary and Sheet-like Molecular Clouds with Magnetic Fields
Curtis S. Gehman, Fred C. Adams, Richard Watkins
We study the linear evolution of small perturbations in self-gravitating fluid systems with magnetic fields. We consider wave-like perturbations to nonuniform filamentary and sheet…
Wave Motions In Molecular Clouds: Results in Two Dimensions
Curtis S. Gehman, Fred C. Adams, Marco Fatuzzo +1
We study the linear evolution of small perturbations in self-gravitating fluid systems in two spatial dimensions; we consider both cylindrical and cartesian (i.e., slab) geometries…
Interpreting New Data on Large Scale Bulk Flows
Richard Watkins, Hume A. Feldman
We study the implications of a recent estimate of the bulk flow of a sample of galaxies containing supernovae type Ia by Riess, Press, and Kirshner. We find that their results are…
Vortices In Circumstellar Disks
Fred Adams, Richard Watkins
We discuss the physics of vortices in the circumstellar disks associated with young stellar objects. We elucidate the basic physical properties of these localized storm systems. In…
Theoretical Expectations for Bulk Flows in Large Scale Surveys
Hume A. Feldman, Richard Watkins
We calculate the theoretical expectation for the bulk motion of a large scale survey of the type recently carried out by Lauer and Postman. Included are the effects of survey geome…
General Analytic Results for Nonlinear Waves and Solitons in Molecular Clouds
Fred C. Adams, Marco Fatuzzo, Richard Watkins
We study nonlinear wave phenomena in self-gravitating fluid systems, with a particular emphasis on applications to molecular clouds. This paper presents analytical results for one…
Measuring Bulk Flows in Large Scale Surveys
Hume A. Feldman, Richard Watkins
We follow a formalism presented by Kaiser to calculate the variance of bulk flows in large scale surveys. We apply the formalism to a mock survey of Abell clusters á la Lauer \& Po…