Gravitational lensing and Catastrophe theory

Details Gravitational lensing and Catastrophe theory Gravitational lensing and Catastrophe theory

1995-07-20

arxiv.org/abs/astro-ph/9507075v1

Int.J.Mod.Phys. D4 (1995) 685-710

Astronomy and Astrophysics

Astrophysics

24 pages, latex, 18 figures

Scientific paper

10.1142/S0218271895000466

Singularities of caustics appeared in gravitational lensing effect are
discussed analytically. Multipole expansion model of lensing object is mainly
studied since it is tractable and universal. Our analyses are confirmed by
numerical calculations and applied to multiple quasar system of PG1115+080.
Consistencies with elliptical lens models are also discussed.

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