Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-04-06
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures. Submitted to ApJ Letters
Scientific paper
10.1086/312811
We propose a direct method to detect close-in giant planets orbiting stars in the Galactic bulge. This method uses caustic-crossing binary microlensing events discovered by survey teams monitoring the bulge to measure light from a planet orbiting the source star. When the planet crosses the caustic, it is more magnified than the source star; its light is magnified by two orders of magnitude for Jupiter size planets. If the planet is a giant close to the star, it may be bright enough to make a significant deviation in the light curve of the star. Detection of this deviation requires intensive monitoring of the microlensing light curve using a 10-meter class telescope for a few hours after the caustic. This is the only method yet proposed to directly detect close-in planets around stars outside the solar neighborhood.
Gaudi Scott B.
Graff David S.
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