Mathematics – Probability
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop...79k&link_type=abstract
NOAO Proposal ID #2008B-0079
Mathematics
Probability
Scientific paper
Of the known transiting extra-solar planets, ~15% have been detected through photometric follow-up of planets discovered by the radial velocity technique (e.g., HD 209458b). 10% of transiting planets with periods less than ~ 5 day) transit their parent star due to favorable geometric system orientation. Radial velocity curves of known planets can be used to predict transit times and thus construct an optimized photometric follow-up strategy for their detection since one is only limited by the photometric precision achievable by the chosen telescope/instrument and small uncertainties in the timing of the transit. Many of the southern hemisphere planet host stars have not been adequately monitored photometrically in order to confirm or rule out transits of the planet. We propose to use the CTIO 0.9m to conduct a photometric survey of these exoplanet host stars to search for transit signatures. We produce transit ephemerides and optimal observing windows for each of the known radial velocity planets observable from CTIO with a sufficiently high transit probability and signal-to-noise ratio. We will optimize our observing run such that we monitor individual targets for as long as possible during a given night to gather data in and out of eclipse as well as ingress and egress, if possible. In combination with literature radial velocity data, we can thus fully characterize the planetary system if a transit occurs since period and eccentricity are known, and mass is certain to within a factor of sin(inclination angle). In the case of a null detection, our photometry is used to place constraints on orbital and astrophysical parameters of the planet.
Kane Stephen
von Braun Kaspar
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