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Full-Text Articles in Physical Sciences and Mathematics
Five New Transits Of The Super-Neptune Hd 149026b, Joshua N. Winn, Gregory W. Henry, Guillermo Torres, Matthew J. Holman
Five New Transits Of The Super-Neptune Hd 149026b, Joshua N. Winn, Gregory W. Henry, Guillermo Torres, Matthew J. Holman
Information Systems and Engineering Management Research Publications
We present new photometry of HD 149026 spanning five transits of its "super-Neptune" planet. In combination with previous data, we improve on the determination of the planet-to-star radius ratio: Rp/R⋆ = 0.0491+ 0.0018−0.0005. We find the planetary radius to be 0.71 ± 0.05 RJup, in accordance with previous theoretical models invoking a high metal abundance for the planet. The limiting error is the uncertainty in the stellar radius. Although we find agreement among four different ways of estimating the stellar radius, the uncertainty remains at 7%. We also present a refined transit ephemeris and a constraint on the orbital eccentricity …
A Determination Of The Spin-Orbit Alignment Of The Anomalously Dense Planet Orbiting Hd 149026, Aaron S. Wolf, Gregory Laughlin, Gregory W. Henry, Debra A. Fischer, Geoffrey W. Marcy, R. Paul Butler, Steve Vogt
A Determination Of The Spin-Orbit Alignment Of The Anomalously Dense Planet Orbiting Hd 149026, Aaron S. Wolf, Gregory Laughlin, Gregory W. Henry, Debra A. Fischer, Geoffrey W. Marcy, R. Paul Butler, Steve Vogt
Information Systems and Engineering Management Research Publications
We report 35 radial velocity measurements of HD 149026 taken with the Keck Telescope. Of these measurements, 15 were made during the transit of the companion planet HD 149026b, which occurred on 2005 June 25. These velocities provide a high-cadence observation of the Rossiter-McLaughlin effect, the shifting of photospheric line profiles that occurs when a planet occults a portion of the rotating stellar surface. We combine these radial velocities with previously published radial velocity and photometric data sets and derive a composite best-fit model for the star-planet system. This model confirms and improves previously published orbital parameters, including the remarkably …
The N2k Consortium. Ii. A Transiting Hot Saturn Around Hd 149026 With A Large Dense Core, Bun'ei Sato, Debra A. Fischer, Gregory W. Henry, Gregory Laughlin, R. Paul Butler, Geoffrey W. Marcy, Steve Vogt, Peter Bodenheimer, Shigeru Ida, Eri Toyota, Aaron S. Wolf, Jeff A. Valenti, Louis J. Boyd, John A. Johnson, Jason T. Wright, Mark Ammons, Sarah E. Robinson, Jay Strader, Chris Mccarthy, Kok Leong Tah, Dante Minniti
The N2k Consortium. Ii. A Transiting Hot Saturn Around Hd 149026 With A Large Dense Core, Bun'ei Sato, Debra A. Fischer, Gregory W. Henry, Gregory Laughlin, R. Paul Butler, Geoffrey W. Marcy, Steve Vogt, Peter Bodenheimer, Shigeru Ida, Eri Toyota, Aaron S. Wolf, Jeff A. Valenti, Louis J. Boyd, John A. Johnson, Jason T. Wright, Mark Ammons, Sarah E. Robinson, Jay Strader, Chris Mccarthy, Kok Leong Tah, Dante Minniti
Information Systems and Engineering Management Research Publications
Doppler measurements from Subaru and Keck have revealed radial velocity variations in the V = 8.15, G0 IV star HD 149026 consistent with a Saturn-mass planet in a 2.8766 day orbit. Photometric observations at Fairborn Observatory have detected three complete transit events with depths of 0.003 mag at the predicted times of conjunction. HD 149026 is now the second-brightest star with a transiting extrasolar planet. The mass of the star, based on interpolation of stellar evolutionary models, is 1.3 ± 0.1 M☉; together with the Doppler amplitude K1 = 43.3 m s-1, we derive a planet mass M sin i …