Defocusing gravitational microlensing

被引：3

作者：

Capozziello, S

deRitis, R

Manko, VI

Marino, AA

Marmo, G

机构：

[1] IST NAZL FIS NUCL, I-80125 NAPLES, ITALY

[2] OSSERV ASTRON CAPODIMONTE, I-80131 NAPLES, ITALY

[3] PN LEBEDEV PHYS INST, MOSCOW 117924, RUSSIA

来源：

PHYSICA SCRIPTA | 1997年 / 56卷 / 02期

关键词：

D O I：

10.1088/0031-8949/56/2/007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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. A 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 phenomenon.

引用

页码：212 / 220

页数：9