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Multipole Expansion Model in Gravitational Lensing

T. Fukuyama·Y. Kakigi·T. Okamura
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Abstract

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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T. Fukuyama, Y. Kakigi, T. Okamura. 1997-01-31. Multipole Expansion Model in Gravitational Lensing. https://doi.org/10.1142/s021827189700025x

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