Hirano, Teruyuki, Suto, Yasushi, Taruya, Atsushi, Narita, Norio, Sato, Bun'ei, Johnson, John Asher, ...
We obtain analytical expressions for the velocity anomaly due to the Rossiter-McLaughlin effect, for the case when the anomalous radial velocity is obtained by cross-correlation with a stellar...
HAT-P-7: A Retrograde or Polar Orbit, and a Third Body (2009)
Winn, Joshua N., Johnson, John Asher, Albrecht, Simon, Howard, Andrew W., Marcy, Geoffrey W., Crossfield, Ian J., ...
We show that the exoplanet HAT-P-7b has an extremely tilted orbit, with a true angle of at least 86 degrees with respect to its parent star's equatorial plane, and a strong possibility of retrograde...
The Transit Ingress and the Tilted Orbit of the Extraordinarily Eccentric Exoplanet HD 80606b (2009)
Winn, Joshua N., Howard, Andrew W., Johnson, John Asher, Marcy, Geoffrey W., Gazak, J. Zachary, Starkey, Donn, ...
We present the results of a transcontinental campaign to observe the 2009 June 5 transit of the exoplanet HD 80606b. We report the first detection of the transit ingress, revealing the transit...
A Third Planet Orbiting HIP 14810 (2009)
Wright, Jason T., Fischer, Debra A., Ford, Eric B., Veras, Dimitri, Wang, Ji, Henry, Gregory W., ...
We present new precision radial velocities and a three-planet Keplerian orbit fit for the V = 8.5, G5 V star HIP 14810. We began observing this star at Keck Observatory as part of the N2K Planet...
Old, Rich, and Eccentric: Two Jovian Planets Orbiting Evolved Metal-Rich Stars (2009)
Peek, Kathryn M. G., Johnson, John Asher, Fischer, Debra A., Marcy, Geoffrey W., Henry, Gregory W., Howard, Andrew W., ...
We present radial velocity measurements of two stars observed as part of the Lick Subgiants Planet Search and the Keck N2K survey. Variations in the radial velocities of both stars reveal the...
The Spin-Orbit Misalignment of the XO-3 Exoplanetary System (2009)
Winn, Joshua N., Johnson, John Asher, Fabrycky, Daniel, Howard, Andrew W., Marcy, Geoffrey W., Narita, Norio, ...
We present photometric and spectroscopic observations of the 2009 Feb. 2 transit of the exoplanet XO-3b. The new data show conclusively that the planetary orbital axis and stellar rotation axis are...
Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems (2008)
Wright, J. T., Upadhyay, S., Marcy, G. W., Fischer, D. A., Ford, Eric B., Johnson, John Asher
We present the latest velocities for 10 multi-planet systems, including a re-analysis of archival Keck and Lick data, resulting in improved velocities that supersede our previously published...
The Transit Light Curve Project. X. A Christmas Transit of HD 17156b (2008)
Winn, Joshua N., Holman, Matthew J., Henry, Gregory W., Torres, Guillermo, Fischer, Debra, Johnson, John Asher, ...
Photometry is presented of the Dec. 25, 2007 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of...
The prograde orbit of exoplanet TrES-2b (2008)
Winn, Joshua N., Johnson, John Asher, Narita, Norio, Suto, Yasushi, Turner, Edwin L., Fischer, Debra A., ...
We monitored the Doppler shift of the G0 V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in...
The Prograde Orbit of Exoplanet TrES-2b (2008)
Winn, Joshua N., Johnson, John Asher, Narita, Norio, Suto, Yasushi, Turner, Edwin L., Fischer, Debra A., ...
We monitored the Doppler shift of the G0V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in...
The Transit Light Curve Project. VII. The Not-So-Bloated Exoplanet HAT-P-1b (2007)
Winn, Joshua N, Holman, Matthew J, Bakos, Gaspar Á, Pál, András, Johnson, John Asher, Williams, Peter K G, ...
We present photometry of the G0 star HAT-P-1 during six transits of its close-in giant planet, and we refine the estimates of the system parameters. Relative to Jupiter's properties, HAT-P-1b is 1.20...
The Transit Light Curve Project. VII. The Not-So-Bloated Exoplanet HAT-P-1b (2007)
Winn, Joshua N., Holman, Matthew J., Bakos, Gaspar A., Pal, Andras, Johnson, John Asher, Williams, Peter K. G., ...
We present photometry of the G0 star HAT-P-1 during six transits of its close-in giant planet, and we refine the estimates of the system parameters. Relative to Jupiter's properties, HAT-P-1b is 1.20...
Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b (2007)
Winn, Joshua N., Johnson, John Asher, Peek, Kathryn M. G., Marcy, Geoffrey W., Bakos, Gaspar A., Enya, Keigo, ...
The short-period exoplanet HD 147506b (also known as HAT-P-2b) has an eccentric orbit, raising the possibility that it migrated through planet-planet scattering or Kozai oscillations accompanied by...
John Asher Johnson, Geoffrey W. Marcy, Debra A. Fischer, Gregory W. Henry, Jason T. Wright, Howard Isaacson, ...
We report the detection of a Jupiter-mass planet in a 6.838 day orbit around the 1.28 M � subgiant HD 185269. The eccentricity of HD 185269b (e 0:30) is unusually large compared to other planets...
Joshua N. Winn, Matthew J. Holman, Gregory W. Henry, Anna Roussanova, Keigo Enya, Yuzuru Yoshii, ...
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and...
Joshua N. Winn, John Asher Johnson, Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, Gregory W. Henry, ...
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 stellar surface),...
THE N2K CONSORTIUM. VI. DOPPLER SHIFTS WITHOUT TEMPLATES AND THREE NEW SHORT-PERIOD PLANETS 1 (2006)
John Asher Johnson, Geoffrey W. Marcy, Debra A. Fischer, Gregory Laughlin, R. Paul Butler, Gregory W. Henry, ...
We present a modification to the iodine cell Doppler technique that eliminates the need for an observed stellar template spectrum. For a given target star, we iterate toward a synthetic template...
Johnson, John Asher, Winn, Joshua N., Rampazzi, Francesca, Barbieri, Cesare, Mito, Hiroyuki, Tarusawa, Ken-ichi, ...
The unusual pre-main-sequence binary star named KH 15D undergoes remarkably deep and long-lasting periodic eclipses. Some clues about the reason for these eclipses have come from the observed...