979 citations
- Center for Astrophysics Harvard & SmithsonianUS68 papers
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9 papers · 1 filter
The Transit Light Curve Project. V. System Parameters and Stellar Rotation Period of HD 189733
Joshua N. Winn, Matthew J. Holman, Gregory W. Henry +8
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning two years. Using the transit photometry, we determine…
Photospheric temperature measurements in young main sequence stars
K. Biazzo, A. Frasca, G. W. Henry +2
As part of our program to study stellar photospheric and chromospheric activity, we have examined several young solar type stars with activity levels intermediate between the Sun a…
Photospheric and chromospheric activity in four young solar-type stars
Katia Biazzo, Antonio Frasca, Gregory W. Henry +2
We present a photometric and spectroscopic study of four G-K dwarfs, namely HD 166, epsilon Eri, chi1 Ori and kappa1 Cet. In three cases, we find a clear spatial association betwee…
On the Search For Transits of the Planets Orbiting Gl 876
P. D. Shankland, E. J. Rivera, G. Laughlin +14
We report the results of a globally coordinated photometric campaign to search for transits by the P ~ 30 d and P ~ 60 d outer planets of the 3-planet system orbiting the nearby M-…
Measurement of the Spin-Orbit Alignment in the Exoplanetary System HD 189733
Joshua N. Winn, John A. Johnson, Geoffrey W. Marcy +9
We present spectroscopy of a transit of the exoplanet HD 189733b. By modeling the Rossiter-McLaughlin effect (the anomalous Doppler shift due to the partial eclipse of the rotating…
An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269
John A. Johnson, Geoffrey W. Marcy, Debra A. Fischer +4
We report the detection of a Jupiter-mass planet in a 6.838 day orbit around the 1.28 solar mass subgiant HD 185269. The eccentricity of HD 185269b (e = 0.30) is unusually large co…