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XO-2b: a Prograde Planet with a Negligible Eccentricity, and an Additional Radial Velocity Variation
Norio Narita, Teruyuki Hirano, Bun'ei Sato +4
We present precise radial velocities of XO-2 taken with the Subaru HDS, covering two transits of XO-2b with an interval of nearly two years. The data suggest that the orbital eccen…
Improved Modeling of the Rossiter-McLaughlin Effect for Transiting Exoplanets
Teruyuki Hirano, Yasushi Suto, Joshua N. Winn +4
We present an improved formula for the anomalous radial velocity of the star during planetary transits due to the Rossiter-McLaughlin (RM) effect. The improvement comes from a more…
The SPICA coronagraphic instrument (SCI) for the study of exoplanets
K. Enya, T. Kotani, K. Haze +39
We present the SPICA Coronagraphic Instrument (SCI), which has been designed for a concentrated study of extra-solar planets (exoplanets). SPICA mission provides us with a unique o…
Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation
Teruyuki Hirano, Norio Narita, Bun'ei Sato +5
We report on observations of the Rossiter-McLaughlin (RM) effect for the XO-3 exoplanetary system. The RM effect for the system was previously measured by two different groups, but…
Two Upper Limits on the Rossiter-McLaughlin Effect, with Differing Implications: WASP-1 has a High Obliquity and WASP-2 is Indeterminate
Simon Albrecht, Joshua N. Winn, John Asher Johnson +9
We present precise radial-velocity measurements of WASP-1 and WASP-2 throughout transits of their giant planets. Our goal was to detect the Rossiter-McLaughlin (RM) effect, the ano…