Over 100 Validated and Candidate Planets Orbiting Bright Stars in K2 Campaigns 0-10

Monday 2 July, 14:50

Since 2014, NASA's K2 mission has observed large portions of the ecliptic plane in search of transiting planets and has detected hundreds of planet candidates. With observations planned until at least late 2018, K2 will continue to identify more planet candidates. We present here 275 planet candidates observed during Campaigns 0-10 of the K2 mission that are orbiting stars brighter than 13th magnitude and for which we have obtained high-resolution spectra. We analyze these candidates using the VESPA package in order to calculate the false positive probability (FPP), and find that 149 candidates are validated with a FPP less than 0.1%. We show tentative evidence of a gap in the planet radius distribution. Comparing our sample to the Kepler candidate sample investigated by Fulton and collaborators, we conclude that more planets are required to confirm the gap. This work, in addition to increasing the population of validated K2 planets by nearly 50% and providing new targets for follow-up observations, will also serve as a framework for validating candidates from upcoming K2 campaigns as well as the Transiting Exoplanet Survey Satellite (TESS).

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