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Discerning Exoplanet Migration Models Using Spin-Orbit Measurements
Timothy D. Morton, John Asher Johnson
We investigate the current sample of exoplanet spin-orbit measurements to determine whether a dominant planet migration channel can be identified, and at what confidence. We use th…
Orbital Orientations of Exoplanets: HAT-P-4b is Prograde and HAT-P-14b is Retrograde
Joshua N. Winn, Andrew W. Howard, John Asher Johnson +9
We present observations of the Rossiter-McLaughlin effect for two exoplanetary systems, revealing the orientations of their orbits relative to the rotation axes of their parent sta…
LHS6343C: A Transiting Field Brown Dwarf Discovered by the Kepler Mission
John Asher Johnson, Kevin Apps, J. Zachary Gazak +7
We report the discovery of a brown dwarf that transits one member of the M+M binary system LHS6343AB every 12.71 days. The transits were discovered using photometric data from the…
A hot Jupiter orbiting the 1.7 Msun Subgiant HD102956
John Asher Johnson, Brendan P. Bowler, Andrew W. Howard +7
We report the detection of a giant planet in a 6.4950 day orbit around the 1.7 Msun subgiant HD102956. The planet has a semimajor axis a = 0.081 AU and minimum mass Msini = 0.96 Mj…