DISCOVERING PLANETARY SYSTEMS THROUGH GRAVITATIONAL MICROLENSES

被引：462

作者：

GOULD, A

LOEB, A

机构：

[1] Institute for Advanced Study, Princeton

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 396卷 / 01期

关键词：

GRAVITATIONAL LENSING; PLANETARY SYSTEMS; STARS; VARIABLES; OTHER;

D O I：

10.1086/171700

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Planetary systems of Galactic disk stars can be detected as microlenses of stars in the Galactic bulge. Planets in a solar-like system positioned half-way to the Galactic center should leave a noticeable signature (magnification larger that 5%) on the light curve of a gravitationally lensed bulge star in approximately 20% of the microlensing events. This high probability results from a coincidence between Jupiter's orbital radius and the solar Einstein radius at this distance. Typical planetary signals last for about 1 day, a small fraction of the approximately 1 month duration of the entire microlensing event. Dedicated monitoring of microlensing candidates is suggested as a method to discover planetary systems in conjunction with forthcoming observations toward the

引用

页码：104 / 114

页数：11

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