Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97..169o&link_type=abstract
Astronomy and Astrophysics, vol. 97, no. 1, Apr. 1981, p. 169-174.
Astronomy and Astrophysics
Astronomy
18
Astronomical Models, Black Holes (Astronomy), Cosmology, Galactic Clusters, Galactic Evolution, Density Distribution, Hubble Constant, Mass Distribution, Perturbation Theory, Radial Velocity
Scientific paper
Motivated by the observations which show the existence of large scale holes in the matter distribution in superclusters of galaxies, this paper studies the development of density gradients in initially uniform cosmological models due to the onset of energy perturbations in the Hubble flow. Spherical symmetry is assumed and the density profiles are described by means of Tolman models which asymptotically become uniform Friedmann-Robertson-Walker Universes. In previous work the formation of cavities around mass condensations originated by uniform, spherical energy perturbations was pointed out. Here it is shown that cavities do form also around more realistic continuous energy perturbations, which yield continuous density profiles. Thus an interesting initial condition for the development of cosmological condensations and the surrounding cavities consists of energy perturbations rather than density perturbations, of the Hubble flow.
Occhionero Franco
Veccia-Scavalli L.
Vittorio Nicola
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