Microlens mass measurement using triple-peak events

被引：18

作者：

An, JH ^{[1
]}

Gould, A ^{[1
]}

机构：

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

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 563卷 / 02期

基金：

美国国家科学基金会;

关键词：

gravitational lensing;

D O I：

10.1086/338657

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that one can measure the effects of microlens parallax for binary microlensing events with three well-measured peaks, two caustic crossings plus a cusp approach, and hence derive the projected Einstein radius (r) over tilde (E). Since the angular Einstein radius theta (E) is measurable from finite-source effects for almost any well-observed caustic crossing, triple-peak events can yield the determination of the lens mass M = (c(2)/4G)(r) over tilde (E)theta (E). We note that, to a certain extent, rotation of the binary can mimic the effects of parallax, but it should often be possible to disentangle parallax from rotation by making use of the late-time light curve.

引用

页码：L111 / L114

页数：4

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