Defocusing gravitational microlensing
天体物理学
2009-10-28 v1
摘要
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.
引用
@article{arxiv.astro-ph/9610161,
title = {Defocusing gravitational microlensing},
author = {Salvatore Capozziello and Ruggiero de Ritis and Vladimir Mank'o and Alma Angela Marino and Giuseppe Marmo},
journal= {arXiv preprint arXiv:astro-ph/9610161},
year = {2009}
}
备注
19 pages, latex, submitted to Physica Scripta