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Eleven Multi-planet Systems from K2 Campaigns 1 & 2 and the Masses of Two Hot Super-Earths
Evan Sinukoff, Andrew W. Howard, Erik A. Petigura +14
We present a catalog of 11 multi-planet systems from Campaigns 1 and 2 of the K2 mission. We report the sizes and orbits of 26 planets split between seven 2-planet systems and four…
Two Transiting Low Density Sub-Saturns from K2
Erik A. Petigura, Andrew W. Howard, Eric D. Lopez +11
We report the discovery and confirmation of two sub-Saturn planets orbiting a bright (V = 11.3), metal-rich ([Fe/H] = 0.42 0.04 dex) G3 dwarf in the K2 Campaign 2 field. The…
A low stellar obliquity for WASP-47, a compact multiplanet system with a hot Jupiter and an ultra-short period planet
Roberto Sanchis-Ojeda, Joshua N. Winn, Fei Dai +9
We have detected the Rossiter-Mclaughlin effect during a transit of WASP-47b, the only known hot Jupiter with close planetary companions. By combining our spectroscopic observation…
Two Transiting Earth-size Planets Near Resonance Orbiting a Nearby Cool Star
Erik A. Petigura, Joshua E. Schlieder, Ian J. M. Crossfield +11
Discoveries from the prime Kepler mission demonstrated that small planets (< 3 Earth-radii) are common outcomes of planet formation. While Kepler detected many such planets, all bu…
Three Super-Earths Orbiting HD 7924
Benjamin J. Fulton, Lauren M. Weiss, Evan Sinukoff +6
We report the discovery of two super-Earth mass planets orbiting the nearby K0.5 dwarf HD 7924 which was previously known to host one small planet. The new companions have masses o…