Gravitational lens under perturbations: Symmetry of perturbing potentials with invariant caustics

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dc.creatorAn, Jin H.
dc.date2004-10-15
dc.date2005-01-07
dc.date.accessioned2026-07-07T02:15:17Z
dc.date.available2026-07-07T02:15:17Z
dc.descriptionWhen the gravitational lensing potential can be approximated by that of circularly symmetric system affected by weak perturbations, it is found that the shape of the resulting (tangential) caustics is entirely specified by the local azimuthal behaviour of the affecting perturbations. This provides a common mathematical groundwork for understanding problems such as the close-wide (d <-> 1/d) separation degeneracy of binary lens microlensing lightcurves and the shear-ellipticity degeneracy of quadruple image lens modelling.
dc.descriptionto appear in MNRAS, including 4 figures, typo corrected, essentially identical to the version to be published
dc.identifierhttps://arxiv.org/abs/astro-ph/0410388
dc.identifierhttp://arxiv.org/abs/astro-ph/0410388
dc.identifierMon.Not.Roy.Astron.Soc. 356 (2005) 1409-1428
dc.identifierdoi:10.1111/j.1365-2966.2004.08581.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/8381
dc.subjectAstrophysics
dc.titleGravitational lens under perturbations: Symmetry of perturbing potentials with invariant caustics
dc.typetext

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