Extraction of cosmological information from multiimage gravitational lenses

Details Extraction of cosmological information from multiimage gravitational lenses Extraction of cosmological information from multiimage gravitational lenses

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...318l...1k&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 318, July 1, 1987, p. L1-L5.

Astronomy and Astrophysics

Astrophysics

7

Astronomical Spectroscopy, Cosmology, Gravitational Lenses, Mass Distribution, Dipole Moments, Galactic Clusters, Relativity

Scientific paper

The effects of possible invisible large-scale mass inhomogeneities inside and outside the light beam have been reported in the past to be the obstacles to determination of the distance measure to a gravitational lens, and to produce uncertainties of fundamental nature. It is shown here that for lenses of four or more images the determination of the distance measure is nevertheless possible. The appropriate procedure for doing so is presented in a general form and demonstrated by a concrete example. In addition to the distance measure and a large amount of information about the gravitational field of the lens, this procedure yields the dipole moment at the lens position, which contains contributions of mass inhomogeneities on a very large scale.

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