2.3k citations · 46.3k across the 327 of their papers we have counts for
7 papers · 1 filter
Testing the Gravitational Instability Hypothesis?
A. Babul, D. Weinberg, A. Dekel +1
We challenge a widely accepted assumption of observational cosmology: that successful reconstruction of observed galaxy density fields from measured galaxy velocity fields (or vice…
Evolution of One-Point Distributions from Gaussian Initial Fluctuations
Lev Kofman, Edmund Bertschinger, James M. Gelb +2
We study the quasilinear evolution of the one-point probability density functions (PDFs) of the smoothed density and velocity fields in a cosmological gravitating system beginning…
On Nonlinear Approximations to Cosmic Problems with Mixed Boundary Conditions
Paul J. Mancinelli, Amos Yahil, Galit Ganon +1
Nonlinear approximations to problems with mixed boundary conditions are useful for predicting large-scale streaming velocities from the density field, or vice-versa. We evaluate th…
Do Spirals and Ellipticals Trace the Same Velocity Field?
T. Kolatt, A. Dekel
We test the hypothesis that the velocity field derived from Tully-Fisher measurements of spiral galaxies, and that derived independently from Dn-sigma measurements of ellipticals a…
Determining Omega from Peculiar Velocities
Avishai Dekel
The large-scale dynamics of matter is inferred from the observed peculiar velocities of galaxies via the POTENT procedure. The smoothed fields of velocity and mass-density fluctuat…
Omega from Velocities in Voids
Avishai Dekel, Martin Rees
We propose a method for deriving a dynamical lower bound on from diverging flows in low-density regions, based on the fact that large outflows are not expected in a low- uni…
Evidence for Gaussian Initial Fluctuations from the 1.2 Jy IRAS Survey
A. Nusser, A. Dekel, A. Yahil
We recover the one-point probability distribution function of the {\it initial} density fluctuations (\ipdf) from the quasi-linear galaxy density field of the 1.2 Jy \iras\ redshif…