Light propagation in generalized Friedmann universes

Details Light propagation in generalized Friedmann universes Light propagation in generalized Friedmann universes

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...206..190l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 206, no. 2, Nov. 1988, p. 190-198.

Statistics

Computation

46

Computational Astrophysics, Cosmology, Electromagnetic Radiation, Light Transmission, Universe, Asymptotic Methods, Distance, Gravitational Lenses, Light Beams, Red Shift, Relic Radiation

Scientific paper

Since the vast majority of our astrophysical knowledge arises from observations of electromagnetic radiation from distant sources, the question of how light propagates through a realistic, rather than a purely idealized, universe is of great interest. The author investigates the properties of the angular diameter distance in a locally inhomogeneous, multi-component universe with evolving structure, generalizing the model of Dyer and Roeder. The author also discusses possible constraints on the energy density of non-dust components, the impact on gravitational lensing, and problems in interpreting cosmic microwave background angular anisotropies. Certain cosmic string models are shown to be invisible in the distance-redshift relation.

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