Other
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.1004a&link_type=abstract
American Astronomical Society, DPS meeting #38, #10.04; Bulletin of the American Astronomical Society, Vol. 38, p.494
Other
Scientific paper
Transiting extrasolar planets provide a unique opportunity for studying physical properties of planets around other stars. From a series of accurately-timed light curve observations, we get physical information on the planet and the star: the ratio of the radius of the planet to that of the star, the inclination of the planetary orbit, the limb darkening of the star, and the timing of the observed transits. With high accuracy photometry, it is possible to search for timing variations that result from satellites or from otherwise undetected planets in the system. Accurate determination of the planetary radius, combined with the planetary mass obtained from radial velocity surveys, will lead to improved theoretical models of planetary structure, since the current values for many transiting planets are not known very accurately.
We report on a pilot project on the 6.5m Clay telescope at Magellan using POETS (Portable Occultation, Eclipse, and Transit Systems; Souza et al., in preparation). Measurements of two light curves for the transiting planet OGLE-TR-56b were made during June-July 2006. We have obtained improved values of the radius, with an error of a few percent on a single transit. Each individual transit midtime is fitted and the results are compiled to search for subtle variations in the timing of the transit.
Adams Elisabeth R.
Elliot James L.
Lopez-Morales Mercedes
Osip David J.
Seager Sara
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