AAS 197, January 2001
Session 11. Extrasolar Planets and Very Low Mass Stars
Display, Monday, January 8, 2001, 9:30am-7:00pm, Exhibit Hall

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[11.09] Microlensing Planets: Multiple Planet Systems as Gravitational Triple Lenses

S. Rhie, D. Bennett (U. Notre Dame)

Gravitational microlensing is a superb exoplanet search technique. The merits include: mass sensitivity to all range of planets down to Mars; the detection window is partially inclusive of the habitable zones; massive moons of the exoplanets can be found; the duration of the events is typically less than two months, ~ 70 times shorter than the 12 year orbital period of Jupiter; it is largely free of selection bias because microlensing occurs by chance, and "oddities" such as circumbinary planets and multiple planets will be detected with a fair share of chance; it is the only method that can probe the Galactic and extragalactic families of planets that may orbit ordinary stars.

Most of the microlensing planets will be discovered as gravitational (planetary) binary lenses. However, some of them will be discovered as higher multiple lens systems. Here, we discuss the gravitational triple lens systems which can produce up to 10 images. Discussion subjects include: classification of caustics, effect of three-body instabilities, numerical complications, and discovery perspective of multiple planet systems with GEST (Galactic Exoplanet Survey Telescope).

This work has been supported in part by the NASA and the NSF.

If you would like more information about this abstract, please follow the link to http://bustard.phys.nd.edu/MPS/. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: srhie@nd.edu

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