Effective Curvature of the Universe in Observations of Distant Objects

Details Effective Curvature of the Universe in Observations of Distant Objects Effective Curvature of the Universe in Observations of Distant Objects

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005arep...49..771i&link_type=abstract

Astronomy Reports, vol. 49, Issue 10, p.771-776

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We analyze the propagation of light in a universe with density inhomogeneities, which, as was first demonstrated by Zel’dovich, systematically affect the angular sizes and apparent magnitudes of distant objects. The Zel’dovich effect can be represented in terms of an effective curvature, which is proportional to the magnitude of the inhomogeneities. We estimate the effective curvature, radius of curvature, and mean distance between conjugate points for the cases when the density inhomogeneities are taken to be stars in the Galaxy, galaxies, and clusters of galaxies. We discuss the possibility of detecting the Zel’dovich effect using modern astronomical data.

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