出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：One of the successful techniques for the detection of exoplanets relies on the magnification of an
observed star resulting from microlensing by a foreground star orbited by a planetary companion.
We propose an alternative method for the detection of exoplanets by microlensing, in which the
orbital motion of a planet around the source star induces a small motion of the star around the
common barycentre, which leads to detectable deviations from the ordinary symmetricmicrolensing
light curve. We show that favourable events for such deviations to occur involve lenses close
to the source star and Einstein-radius crossing times substantially larger than the planet’s orbital
period. From a Monte-Carlo simulation, we find that a monitoring programme of Galactic bulge
stars, capable of providing a 2-hour sampling and 2% photometric accuracy, can detect planets
of Jupiter mass with a detection efficiency of around 1%.
