Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20915204b&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #152.04; Bulletin of the American Astronomical Society,
Other
1
Scientific paper
Graviational microlensing is one of a few extrasolar planet detection methods that is able to detect Earth-mass planets in the next few years. Microlensing is most sensitive to planets orbiting in the vicinity of the "snow line", which is exterior to the habitable zone and controls gas giant formation. This complements other techniques, like radial velocities and transits, that are most sensitive interior to the habitable zone. Thus, microlensing discoveries will be important for understanding planet formation and for estimating the frequency of Earth-mass planets in the habitable zone, which must be known before the Terrestrial Planet Finder mission can be developed. However, the microlensing light curve observations provide only loose constraints on the properties of the planetary host stars. We show that the properties of the host star can generally be determined with high resolution follow-up observations taken a few years after the planetary microlensing signal is observed. Examples are presented from the extrasolar planets already discovered by microlensing, and we show that the proposed Microlensing Planet Finder (MPF) mission will routinely detect and characterize the planetary host stars.
Anderson Jeffrey
Bennett David P.
Gaudi Scott B.
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