On distances and the Hubble parameter determination in gravitational lenses

Details On distances and the Hubble parameter determination in gravitational lenses On distances and the Hubble parameter determination in gravitational lenses

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394...38w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 1, July 20, 1992, p. 38-50.

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Computational Astrophysics, Gravitational Lenses, Hubble Constant, Relativistic Theory, Gravitational Effects, Image Analysis, Inhomogeneity, Luminosity

Scientific paper

Fundamental unsolved problems concerning the gravitational lens effect are discussed on the basis of relativistic optical equations. There are two aspects of the gravitational lens effect, namely, the image deformation and time delay and the apparent amplification of the luminosity of distant sources. The validity of the previous approaches to these aspects and the importance of shear in the cosmological distance are investigated in a simplified model universe. The possibility of the gravitational lens effect as a 'cosmological telescope' to determine the Hubble parameter is also investigated.

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