Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...218...15r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 218, no. 1-2, July 1989, p. 15-18.
Astronomy and Astrophysics
Astrophysics
7
Cosmology, Galactic Evolution, Relativity, Universe, Gravitation, Isotropy, Luminosity, Red Shift
Scientific paper
Observations directly support the large-scale isotropy of the universe around the galaxy but not its homogeneity. General-relativistic dust universes which have but a single center of spherical symmetry have been examined by Tolman (1934) and Bondi (1947). It is shown that by utilizing ideal observations of apparent luminosity, apparent diameter, and number density of galaxies against redshift, together with predictions from a hypothetical ideal theory of galactic evolution, the unknown functions in the Tolman-Bondi metric can in principle be determined for the entire past and future of the observable universe. Since the Friedmann models constitute the homogeneous subclass of Tolman-Bondi models, the analysis could prove useful in testing the homogeneity assumption.
Rindler Wolfgang
Suson Daniel
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