Characterizing Long-Period Transiting Planets Observed by Kepler - AstrophysicsReport as inadecuate

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Abstract: Kepler will monitor a sufficient number of stars that it is likely to detectsingle transits of planets with periods longer than the mission lifetime. Weshow that by combining the exquisite Kepler photometry of such transits withprecise radial velocity observations taken over a reasonable timescale ~ 6months after the transits, and assuming circular orbits, it is possible toestimate the periods of these transiting planets to better than 20%, forplanets with radii greater than that of Neptune, and the masses to within afactor of 2, for planets with masses larger than or about equal to the mass ofJupiter. Using a Fisher matrix analysis, we derive analytic estimates for theuncertainties in the velocity of the planet and the acceleration of the star atthe time of transit, which we then use to derive the uncertainties for theplanet mass, radius, period, semimajor axis, and orbital inclination. Finally,we explore the impact of orbital eccentricity on the estimates of thesequantities.

Author: Jennifer C. Yee, B. Scott Gaudi


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