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On the streaming motions of haloes and galaxies
Ravi K. Sheth, Antonaldo Diaferio, Lam Hui +1
A simple model of how objects of different masses stream towards each other as they cluster gravitationally is described. The model shows how the mean streaming velocity of dark ma…
Constraints on Galaxy Bias, Matter Density, and Primordial Non--Gausianity from the PSCz Galaxy Redshift Survey
Hume A. Feldman, Joshua A. Frieman, J. N. Fry +1
We compute the bispectrum for the \IRAS PSCz catalog and find that the galaxy distribution displays the characteristic signature of gravity. Assuming Gaussian initial conditions, w…
A Fitting Formula for the Non-Linear Evolution of the Bispectrum
Roman Scoccimarro, H. M. P. Couchman
We present a fitting formula for the non-linear evolution of the bispectrum in CDM models, obtained from measurements in high resolution numerical simulations. The formula interpol…
Weak Lensing Predictions at Intermediate Scales
L. Van Waerbeke, T. Hamana, R. Scoccimarro +2
As pointed out in previous studies, the measurement of the skewness of the convergence field will be useful in breaking the degeneracy among the cosmological parameters constra…
Linear and nonlinear contributions to pairwise peculiar velocities
Ravi K. Sheth, Lam Hui, Antonaldo Diaferio +1
We write the correlation function of dark matter particles, xi(r), as the sum of two terms - one which accounts for nonlinear evolution, and dominates on small scales, and another…
A New Angle on Gravitational Clustering
Roman Scoccimarro
We describe a new approach to gravitational instability in large-scale structure, where the equations of motion are written and solved as in field theory in terms of Feynman diagra…