Defocusing gravitational microlensing

Preprint

21 October 1996

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9610161

Abstract

We introduce the notion of defocusing gravitational lens considering a MACHO located behind a light source with respect to an observer. The consequence of defocusing effect is a temporal variability of star luminosity which produces a gap instead of a peak as tell--tale signature in the light curve. General theory of (de)focusing rays (geodesics) in a gravitational field is presented. Furthermore, we give estimations of the mass of the lens and the optical depth connected to such a phenomenon.

Keywords

GRAVITATIONAL MICROLENSING
DEFOCUSING GRAVITATIONAL
GRAVITATIONAL LENS
MACHO LOCATED
LIGHT SOURCE
MICROLENSING
GEODESICS
LENS

All Related Versions

Version 1, 1996-10-21, ArXiv
Published version: Physica Scripta, 56 (2), 212.

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