Direct detection of large close-in planets around the source stars of caustic-crossing microlensing events

被引：15

作者：

Graff, DS ^{[1
]}

Gaudi, BS ^{[1
]}

机构：

[1] Ohio State Univ, Dept Phys & Astron, Columbus, OH 43210 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 538卷 / 02期

基金：

美国国家科学基金会;

关键词：

gravitational lensing; planetary systems;

D O I：

10.1086/312811

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose a direct method to detect close-in Jupiter-sized planets orbiting stars in the Galactic bulge. This method uses caustic-crossing binary microlensing events discovered by survey teams monitoring the bulge to measure light from a planet orbiting the source star. When the planet crosses the caustic, it is more magnified than the source star; its light is magnified by 2 orders of magnitude for Jupiter-sized planets. If the planet has a large radius and is close to the star, it may be bright enough to make a significant deviation in the light curve of the star. Detection of this deviation requires intensive monitoring of the microlensing light curve using a 10 m-class telescope for a few hours after the caustic. This is the only method yet proposed to detect reflected light from close-in planets around stars outside the solar neighborhood.

引用

页码：L133 / L136

页数：4

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