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Rotation and winds of exoplanet HD 189733 b measured with high-dispersion transmission spectroscopy
M. Brogi, R. J. de Kok, S. Albrecht +3
Giant exoplanets orbiting very close to their parent star (hot Jupiters) are subject to tidal forces expected to synchronize their rotational and orbital periods on short timescale…
Tests of the planetary hypothesis for PTFO 8-8695b
Liang Yu, Joshua N. Winn, Michaël Gillon +16
The T Tauri star PTFO 8-8695 exhibits periodic fading events that have been interpreted as the transits of a giant planet on a precessing orbit. Here we present three tests of 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…
A HARPS view on K2-3
J. M. Almenara, N. Astudillo-Defru, X. Bonfils +14
K2 space observations recently found that three super-Earths transit the nearby M dwarf K2-3. The apparent brightness and the small physical radius of their host star rank these pl…
A temperature inversion in WASP-33b? Large Binocular Telescope occultation data confirm significant thermal flux at short wavelengths
C. von Essen, M. Mallonn, S. Albrecht +4
We observed a secondary eclipse of WASP-33b quasi-simultaneously in the optical (~0.55 μm) and the near-infrared (~1.05 μm) using the 2x8.4 m Large Binocular Telescope. WASP-33 is…
Eccentricity from transit photometry: small planets in Kepler multi-planet systems have low eccentricities
Vincent Van Eylen, Simon Albrecht
Solar system planets move on almost circular orbits. In strong contrast, many massive gas giant exoplanets travel on highly elliptical orbits, whereas the shape of the orbits of sm…
The K2-ESPRINT Project. I. Discovery of the Disintegrating Rocky Planet K2-22b with a Cometary Head and Leading Tail
R. Sanchis-Ojeda, S. Rappaport, E. Pallé +28
We present the discovery of a transiting exoplanet candidate in the K2 Field-1 with an orbital period of 9.1457 hr: K2-22b. The highly variable transit depths, ranging from 0…