Multipole Expansion Model in Gravitational Lensing

Details Multipole Expansion Model in Gravitational Lensing Multipole Expansion Model in Gravitational Lensing

1997-01-31

arxiv.org/abs/astro-ph/9702003v1

Astronomy and Astrophysics

Astrophysics

24 pp, Latex, 5 PostScript Figures

Scientific paper

10.1142/S021827189700025X

Non-transparent models of multipole expansion model and two point-mass model
are analyzed from the catastrophe theory. Singularity behaviours of $2^n$-pole
moments are discussed. We apply these models to triple quasar PG1115+080 and
compare with the typical transparent model, softened power law spheroids.
Multipole expansion model gives the best fit among them.

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