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Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems
J. T. Wright, S. Upadhyay, G. W. Marcy +3
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…
A Smaller Radius for the Transiting Exoplanet WASP-10b
John A. Johnson, Joshua N. Winn, Nicole E. Cabrera +1
We present photometry of WASP-10 during the transit of its short-period Jovian planet. We employed the novel PSF-shaping capabilities the OPTIC camera mounted on the UH 2.2m telesc…
The Transit Light Curve Project. X. A Christmas Transit of HD 17156b
Joshua N. Winn, Matthew J. Holman, Gregory W. Henry +6
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…
Measurement of the Spin-Orbit Angle of Exoplanet HAT-P-1b
John A. Johnson, Joshua N. Winn, Norio Narita +16
We present new spectroscopic and photometric observations of the HAT-P-1 planetary system. Spectra obtained during three transits exhibit the Rossiter-McLaughlin effect, allowing u…
The Prograde Orbit of Exoplanet TrES-2b
Joshua N. Winn, John Asher Johnson, Norio Narita +7
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)…
Retired A Stars and Their Companions II: Jovian planets orbiting kappa Coronae Borealis and HD167042
John A. Johnson, Geoffrey W. Marcy, Debra A. Fischer +5
We report precise Doppler measurements of two evolved stars, kappa CrB (HD142091) and HD 167042, obtained at Lick Observatory as part of our search for planets orbiting intermediat…
Planets Around Massive Subgiants
John A. Johnson
Compared to planets around Sun-like stars, relatively little is known about the occurrence rate and orbital properties of planets around stars more massive than 1.3 Msun. The appar…
The Transit Light Curve Project. VII. The Not-So-Bloated Exoplanet HAT-P-1b
Joshua N. Winn, Matthew J. Holman, Gaspar A. Bakos +8
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 propertie…
A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass
John A. Johnson, R. Paul Butler, Geoffrey W. Marcy +4
We report precise Doppler measurements of GJ317 (M3.5V) that reveal the presence of a planet with a minimum mass Msini = 1.2 Mjup in an eccentric, 692.9 day orbit. GJ317 is only th…
Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b
Joshua N. Winn, John Asher Johnson, Kathryn M. G. Peek +7
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 oscillatio…
Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants
John A. Johnson, Debra A. Fischer, Geoffrey W. Marcy +6
We report precision Doppler measurements of three intermediate-mass subgiants from Lick and Keck Observatories. All three stars show variability in their radial velocities consiste…
Five Intermediate-Period Planets from the N2K Sample
Debra A. Fischer, Steven S. Vogt, Geoffrey W. Marcy +12
We report the detection of five Jovian mass planets orbiting high metallicity stars. Four of these stars were first observed as part of the N2K program and exhibited low RMS veloci…
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…
The N2K Consortium VI: Doppler Shifts Without Templates and Three New Short-Period Planets
John A. Johnson, Geoffrey W. Marcy, Debra A. Fischer +7
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 synt…
The Orbit and Occultations of KH 15D
Joshua N. Winn, Catrina M. Hamilton, William J. Herbst +4
The unusual flux variations of the pre-main-sequence binary star KH 15D have been attributed to occultations by a circumbinary disk. We test whether or not this theory is compatibl…
The History of the Mysterious Eclipses of KH 15D II. Asiago, Kiso, Kitt Peak, Mt. Wilson, Palomar, Tautenburg and Rozhen Observatories, 1954-97
John Asher Johnson, Joshua N. Winn, Francesca Rampazzi +6
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 t…
KH 15D: A Spectroscopic Binary
John A. Johnson, Geoffrey W. Marcy, Catrina M. Hamilton +2
We present the results of a high-resolution spectroscopic monitoring program of the eclipsing pre-main-sequence star KH 15D that reveal it to be a single-line spectroscopic binary.…
KH 15D: Gradual Occultation of a Pre-Main-Sequence Binary
Joshua N. Winn, Matthew J. Holman, John A. Johnson +2
We propose that the extraordinary ``winking star'' KH 15D is an eccentric pre-main-sequence binary that is gradually being occulted by an opaque screen. This model accounts for the…
The History of the Mysterious Eclipses of KH 15D: Asiago Observatory, 1967-1982
John A. Johnson, Joshua N. Winn
We are gathering archival observations to determine the photometric history of the unique and unexplained eclipses of the pre-main-sequence star KH 15D. Here we present a light cur…