Primordial inhomogeneities in the expanding universe. IV - Peculiar velocity profiles at late times

Details Primordial inhomogeneities in the expanding universe. IV - Peculiar velocity profiles at late times Primordial inhomogeneities in the expanding universe. IV - Peculiar velocity profiles at late times

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...359..263o&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 359, Aug. 20, 1990, p. 263-266.

Mathematics

Logic

2

Cosmology, Radial Velocity, Universe, Velocity Distribution, Astronomical Models, Expansion, Galactic Clusters, Cosmology, Galaxies: Clustering

Scientific paper

We study the peculiar velocity profile that forms around a spherically symmetric bound central core immersed in a homogeneous background k = 0 or k = -1 Friedmann-Robertson-Walker cosmological model, with zero pressure. In the nonlinear regime we obtain certain universal features of the peculiar velocity profile that are independent of the details of the initial conditions. We are able to calculate universal values for the slope of the ln (∣peculiar velocity∣)-ln (radius) profile at late times, independent of the shape of the initial profile.

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