Microlensing of close binary stars

Details Microlensing of close binary stars Microlensing of close binary stars

2008-10-13

arxiv.org/abs/0810.2265v1

Astronomy and Astrophysics

Astrophysics

10 pages, accepted to MNRAS

Scientific paper

10.1111/j.1365-2966.2008.14074.x

The gravity due to a multiple-mass system has a remarkable gravitational effect: the extreme magnification of background light sources along extended so-called caustic lines. This property has been the channel for some remarkable astrophysical discoveries over the past decade, including the detection and characterisation of extra-solar planets, the routine analysis of limb-darkening, and, in one case, limits set on the apparent shape of a star several kiloparsec distant. In this paper we investigate the properties of the microlensing of close binary star systems. We show that in some cases it is possible to detect flux from the Roche lobes of close binary stars. Such observations could constrain models of close binary stellar systems.

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