Amplification near gravitational lens caustics

Details Amplification near gravitational lens caustics Amplification near gravitational lens caustics

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...221....1k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 221, no. 1, Aug. 1989, p. 1-3.

Statistics

Computation

15

Caustics (Optics), Gravitational Lenses, Quasars, Computational Astrophysics, Flux Quantization, Gravitational Fields, Relativistic Theory

Scientific paper

A simple analytical expression for the flux factor of the amplification near caustics of gravitational lenses is proposed. The flux factor is shown to be useful in evaluating the strength of high-amplification events (HAEs) which occur mainly by microlensing. It is demonstrated that flux factors can be used for statistical purposes in numerical simulations of gravitational lenses. In order to estimate the source radius from a HAE, the present method is applied to extended sources, integrating over that part of the source which is on the bright side of the caustic where each source point produces two image points.

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