A Search for Additional Planets in the NASA EPOXI Observations of the Exoplanet System GJ 436 (2009)
Ballard, Sarah, Christiansen, Jessie L., Charbonneau, David, Deming, Drake, Holman, Matthew J., Fabrycky, Daniel, ...
We present time series photometry of the M dwarf transiting exoplanet system GJ 436 obtained with the the EPOCh (Extrasolar Planet Observation and Characterization) component of the NASA EPOXI...
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...
Bianco, Federica B., Protopapas, Pavlos, McLeod, Brian A., Alcock, Charles R., Holman, Matthew J., Lehner, Matthew J.
We conducted a search for occultations of bright stars by Kuiper Belt Objects (KBOs) to estimate the density of sub-km KBOs in the sky. We report here the first results of this occultation survey of...
The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b (2009)
Fernandez, Jose M., Holman, Matthew J., Winn, Joshua N., Torres, Guillermo, Shporer, Avi, Mazeh, Tsevi, ...
We present photometry of six transits of the exoplanet XO-2b. By combining the light-curve analysis with theoretical isochrones to determine the stellar properties, we find the planetary radius to be...
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...
Near-infrared transit photometry of the exoplanet HD 149026b (2009)
Carter, Joshua A., Winn, Joshua N., Gilliland, Ronald, Holman, Matthew J.
The transiting exoplanet HD 149026b is an important case for theories of planet formation and planetary structure, because the planet's relatively small size has been interpreted as evidence for a...
Sozzetti, Alessandro, Torres, Guillermo, Charbonneau, David, Winn, Joshua N., Korzennik, Sylvain G., Holman, Matthew J., ...
We report new spectroscopic and photometric observations of the parent stars of the recently discovered transiting planets TrES-3 and TrES-4. A detailed abundance analysis based on high-resolution...
Sozzetti, Alessandro, Torres, Guillermo, Charbonneau, David, Winn, Joshua N., Korzennik, Sylvain G., Holman, Matthew J., ...
We report new spectroscopic and photometric observations of the parent stars of the recently discovered transiting planets TrES-3 and TrES-4. A detailed abundance analysis based on high-resolution...
Winn, Joshua N., Holman, Matthew J., Carter, Joshua A., Torres, Guillermo, Osip, David J., Beatty, Thomas
We present photometry of two transits of the giant planet WASP-4b with a photometric precision of 400-800 parts per million and a time sampling of 25-40 seconds. The two midtransit times are...
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...
A Subaru Pencil-beam Search for m_R~27 Trans-neptunian bodies (2008)
Fuentes, Cesar I., George, Matthew R., Holman, Matthew J.
We present the results of an archival search for Trans-neptunian objects (TNOs) in an ecliptic field observed with Subaru in 2002. The depth of the search allowed us to find 20 new TNOs with...
Preliminary Results on HAT-P-4, TrES-3, XO-2, and GJ 436 from the NASA EPOXI Mission (2008)
Ballard, Sarah, Charbonneau, David, A'Hearn, Michael F., Deming, Drake, Holman, Matthew J., Christiansen, Jessie L., ...
EPOXI (EPOCh + DIXI) is a NASA Discovery Program Mission of Opportunity using the Deep Impact flyby spacecraft. The EPOCh (Extrasolar Planet Observation and Characterization) Science Investigation...
Christiansen, Jessie L., Charbonneau, David, A'Hearn, Michael F., Deming, Drake, Holman, Matthew J., Ballard, Sarah, ...
The NASA Discovery mission EPOXI, utilizing the Deep Impact flyby spacecraft, comprises two phases: EPOCh (Extrasolar Planet Observation and Characterization) and DIXI (Deep Impact eXtended...
A Precise Estimate of the Radius of HD 149026b (2008)
Nutzman, Philip, Charbonneau, David, Winn, Joshua N., Knutson, Heather A., Fortney, Jonathan J., Holman, Matthew J., ...
We present Spitzer 8 micron transit observations of the extrasolar planet system HD 149026. At this wavelength, transit light curves are weakly affected by stellar limb-darkening, allowing for a...
Toward a homogeneous set of transiting planet parameters (2008)
Torres, Guillermo, Winn, Joshua N., Holman, Matthew J.
With 40 or more transiting exoplanets now known, the time is ripe to seek patterns and correlations among their observed properties, which may give important insights into planet formation,...
Photometric Follow-up Observations of the Transiting Neptune-Mass Planet GJ 436b (2008)
Shporer, Avi, Mazeh, Tsevi, Pont, Frederic, Winn, Joshua N., Holman, Matthew J., Latham, David W., ...
This paper presents multi-band photometric follow-up observations of the Neptune-mass transiting planet GJ 436b, consisting of 5 new ground-based transit light curves obtained in May 2007. Together...
A Precise Estimate of the Radius of the Exoplanet HD 149026b from Spitzer Photometry (2008)
Nutzman, Philip, Charbonneau, David, Winn, Joshua N., Knutson, Heather A., Fortney, Jonathan J., Holman, Matthew J., ...
We present Spitzer 8 micron transit observations of the extrasolar planet HD 149026b. At this wavelength, transit light curves are weakly affected by stellar limb-darkening, allowing for a simpler...
The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b (2008)
Winn, Joshua N., Holman, Matthew J., Torres, Guillermo, McCullough, Peter, Johns-Krull, Christopher M., Latham, David W., ...
We present photometry of 13 transits of XO-3b, a massive transiting planet on an eccentric orbit. Previous data led to two inconsistent estimates of the planetary radius. Our data strongly favor the...
A Subaru Archival Search for Faint TNOs (2008)
Fuentes, Cesar I., Holman, Matthew J.
We present the results of a survey for trans-neptunian objects (TNOs) based on Subaru archival images, originally collected by Sheppard et al. (2005) as part of a search for irregular satellites of...
The Transit Light Curve Project. VIII. Six Occultations of the Exoplanet TrES-3 (2008)
Winn, Joshua N., Holman, Matthew J., Shporer, Avi, Fernandez, Jose, Mazeh, Tsevi, Latham, David W., ...
We present photometry of the exoplanet host star TrES-3 spanning six occultations (secondary eclipses) of its giant planet. No flux decrements were detected, leading to 99%-confidence upper limits on...
Five New Transits of the Super-Neptune HD 149026 (2007)
Winn, Joshua N., Henry, Gregory W., Torres, Guillermo, Holman, Matthew J.
We present new photometry of HD 149026 spanning five transits of its "super-Neptune" planet. In combination with previous data, we improve upon the determination of the planet-to-star radius ratio:...
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 (TLC) Project. VI. Three Transits of the Exoplanet TrES-2 (2007)
Holman, Matthew J., Winn, Joshua N., Latham, David W., O'Donovan, Francis T., Charbonneau, David, Torres, Guillermo, ...
Of the nearby transiting exoplanets that are amenable to detailed study, TrES-2 is both the most massive and the one with the largest impact parameter. We present z-band photometry of three transits...
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...
Using Transit Timing Observations to Search for Trojans of Transiting Extrasolar Planets (2007)
Ford, Eric B., Holman, Matthew J.
Theoretical studies predict that Trojans are likely a frequent byproduct of planet formation and evolution. We examine the sensitivity of transit timing observations for detecting Trojan companions...
The Transit Light Curve Project. VI. Three Transits of the Exoplanet TrES-2 (2007)
Holman, Matthew J., Winn, Joshua N., Latham, David W., O'Donovan, Francis T., Charbonneau, David, Torres, Guillermo, ...
Of the nearby transiting exoplanets that are amenable to detailed study, TrES-2 is both the most massive and has the largest impact parameter. We present z-band photometry of three transits of...
A FIVE NEW TRANSITS OF THE SUPER-NEPTUNE HD 149026b (2007)
Joshua N. Winn, Gregory W. Henry, Guillermo Torres, Matthew J. Holman
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...
Winn, Joshua N., Holman, Matthew J., Henry, Gregory W., Roussanova, Anna, Enya, Keigo, Yoshii, Yuzuru, ...
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 stellar and...
The Transit Light Curve Project. I. Four Consecutive Transits of the Exoplanet XO-1b (2006)
Holman, Matthew J., Winn, Joshua N., Latham, David W., O'Donovan, Francis T., Charbonneau, David, Bakos, Gáspár A., ...
We present RIz photometry of four consecutive transits of the newly discovered exoplanet XO-1b. We improve on the estimates of the transit parameters, finding the planetary radius to be RP = 1.184...
The Transit Light Curve Project. III. Tres Transits of TrES-1 (2006)
Winn, Joshua N., Holman, Matthew J., Roussanova, Anna
We present z band photometry of three consecutive transits of the exoplanet TrES-1, with an accuracy of 0.15% and a cadence of 40 seconds. We improve upon estimates of the system parameters, finding...
Measurement of the Spin-Orbit Alignment in the Exoplanetary System HD 189733 (2006)
Winn, Joshua N., Johnson, John A., Marcy, Geoffrey W., Butler, R. Paul, Vogt, Steven S., Henry, Gregory W., ...
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 Transit Light Curve (TLC) Project. II. Two Transits of the Exoplanet OGLE-TR-111b (2006)
Winn, Joshua N., Holman, Matthew J., Fuentes, Cesar I.
As part of our ongoing effort to measure exoplanet sizes and transit times with greater accuracy, we present I band observations of two transits of OGLE-TR-111b. The photometry has an accuracy of...
The Transit Light Curve (TLC) Project. I. Four Consecutive Transits of the Exoplanet XO-1b (2006)
Holman, Matthew J., Winn, Joshua N., Latham, David W., O'Donovan, Francis T., Charbonneau, David, Bakos, Gaspar A., ...
We present RIz photometry of four consecutive transits of the newly discovered exoplanet XO-1b. We improve upon the estimates of the transit parameters, finding the planetary radius to be R_P = 1.184...
The Orbit and Occultations of KH 15D (2006)
Winn, Joshua N., Hamilton, Catrina M., Herbst, William J., Hoffman, Jennifer L., Holman, Matthew J., Johnson, John A., ...
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 compatible with newly...
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),...
Transit Photometry of the Core-Dominated Planet HD 149026b (2005)
Charbonneau, David, Winn, Joshua N., Latham, David W., Bakos, Gaspar, Falco, Emilio E., Holman, Matthew J., ...
We report g, V, and r photometric time series of HD 149026 spanning predicted times of transit of the Saturn-mass planetary companion, which was recently discovered by Sato and collaborators. We...
The Hypervelocity Star SDSS J090745.0+024507 is a Short-Period Variable (2005)
Fuentes, Cesar I., Stanek, K. Z., Gaudi, B. Scott, McLeod, Brian A., Bogdanov, Slavko B., Hartman, Joel D., ...
We present high-precision photometry of the hypervelocity star SDSS J090745.0+024507 (HVS), which has a Galactic rest-frame radial velocity of v=709 km/s, and so has likely been ejected from the...
The Transit Light Curve Project. IV. Five Transits of the Exoplanet OGLE-TR-10b (2005)
Holman, Matthew J., Winn, Joshua N., Fuentes, Cesar I., Hartman, Joel D., Stanek, K. Z., Torres, Guillermo, ...
We present I and B photometry of five distinct transits of the exoplanet OGLE-TR-10b. By modeling the light curves, we find the planetary radius to be R_P = 1.06 +/- 0.08 R_Jup and the stellar radius...
Obliquity Tides on Hot Jupiters (2005)
Winn, Joshua N., Holman, Matthew J.
Obliquity tides are a potentially important source of heat for extrasolar planets on close-in orbits. Although tidal dissipation will usually reduce the obliquity to zero, a nonzero obliquity can...
Measurement of Spin-Orbit Alignment in an Extrasolar Planetary System (2005)
Winn, Joshua N., Noyes, Robert W., Holman, Matthew J., Charbonneau, David, Ohta, Yasuhiro, Taruya, Atsushi, ...
We determine the stellar, planetary, and orbital properties of the transiting planetary system HD 209458, through a joint analysis of high-precision radial velocities, photometry, and timing of the...
On the Rotation Period of (90377) Sedna (2005)
Gaudi, B. Scott, Stanek, Krzysztof Z., Hartman, Joel D., Holman, Matthew J., McLeod, Brian A.
We present precise, ~1%, r-band relative photometry of the unusual solar system object (90377) Sedna. Our data consist of 143 data points taken over eight nights in October 2004 and January 2005. The...
The Use of Transit Timing to Detect Extrasolar Planets with Masses as Small as Earth (2004)
Holman, Matthew J., Murray, Norman W.
Future surveys for transiting extrasolar planets, including the space-based mission Kepler (Borucki et al 2003), are expected to detect hundreds of Jovian mass planets and tens of terrestrial mass...
Near-Infrared Photometry of Irregular Satellites of Jupiter and Saturn (2003)
Grav, Tommy, Holman, Matthew J.
We present JHKs photometry of 10 Jovian and 4 Saturnian irregular satellites, taken with the Near-InfraRed Imager (NIRI) at the 8-m Gemini North Observatory on Mauna Kea, Hawaii. The observed objects...
KH 15D: Gradual Occultation of a Pre-Main-Sequence Binary (2003)
Winn, Joshua N., Holman, Matthew J., Johnson, John A., Stanek, Krzysztof Z., Garnavich, Peter M.
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 periodicity,...
Moran, Sean M., Kuchner, Marc J., Holman, Matthew J.
Precise-Doppler experiments suggest that a massive (m sin i=0.86 M_J) planet orbits at semimajor axis a=3.4 AU around Epsilon Eridani, a nearby star with a massive debris disk. The dynamical...
Photometric Survey of the Irregular Satellites (2003)
Grav, Tommy, Holman, Matthew J., Gladman, Brett, Aksnes, Kaare
We present BVRI colors of 13 Jovian and 8 Saturnian irregular satellites obtained with the 2.56m Nordic Optical Telescope on La Palma, the 6.5m Magellan Baade Telescope on La Campanas, and the 6m MMT...
The Geometry of Resonant Signatures in Debris Disks with Planets (2002)
Kuchner, Marc J., Holman, Matthew J.
Using simple geometrical arguments, we paint an overview of the variety of resonant structures a single planet with moderate eccentricity (e < ~0.6) can create in a dynamically cold, optically thin...
Long-Term Stability of Planets in Binary Systems (1999)
Matthew J. Holman, Paul A. Wiegert
A simple question of celestial mechanics is investigated: in what regions of phase space near a binary system can planets persist for long times? The planets are taken to be test particles moving in...