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HATNet Field G205: Follow-Up Observations of 28 Transiting-Planet candidates and Confirmation of the Planet HAT-P-8b
David W. Latham, Gáspár Á. Bakos, Guillermo Torres +16
We report the identification of 32 transiting-planet candidates in HATNet field G205. We describe the procedures that we have used to follow up these candidates with spectroscopic…
Absolute properties of the low-mass eclipsing binary CM Draconis
J. C. Morales, I. Ribas, C. Jordi +12
Spectroscopic and eclipsing binary systems offer the best means for determining accurate physical properties of stars, including their masses and radii. The data available for low-…
HAT-P-10b: A light and moderately hot Jupiter transiting a K dwarf
G. A. Bakos, A. Pal, G. Torres +17
We report on the discovery of HAT-P-10b, the lowest mass (0.46 +/- 0.03 MJ) transiting extrasolar planet (TEP) discovered to date by transit searches. HAT-P-10b orbits the moderate…
Independent confirmation and refined parameters of the hot Jupiter XO-5b
A. Pál, G. Á. Bakos, J. Fernandez +14
We present HATNet observations of XO-5b, confirming its planetary nature based on evidence beyond that described in the announcement of Burke et al. (2008), namely, the lack of sig…
A New Spectroscopic and Photometric Analysis of the Transiting Planet Systems TrES-3 and TrES-4
A. Sozzetti, G. Torres, D. Charbonneau +17
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…
Absolute dimensions of eclipsing binaries. XXVI. Setting a new standard: Masses, radii, and abundances for the F-type systems AD Bootis, VZ Hydrae, and WZ Ophiuchi
J. V. Clausen, G. Torres, H. Bruntt +5
We determine absolute dimensions and abundances for the three F-type main-sequence detached eclipsing binaries AD Boo, VZ Hya, and WZ Oph and perform a detailed comparison with res…
Near Infrared Monitoring of Ultracool Dwarfs: Prospects for Searching for Transiting Companions
Cullen H. Blake, Joshua S. Bloom, David W. Latham +4
Stars of late-M and L spectral types, collectively known as Ultracool Dwarfs (UCDs), may be excellent targets for searches for extrasolar planets. Owing to their small radii, the s…
HAT-P-9b: A Low Density Planet Transiting a Moderately Faint F star
Avi Shporer, Gaspar A. Bakos, Francois Bouchy +14
We report the discovery of a planet transiting a moderately faint (V=12.3 mag) late F star, with an orbital period of 3.92289 +/- 0.00004 days. From the transit light curve and rad…
Photometric Follow-up Observations of the Transiting Neptune-Mass Planet GJ 436b
Avi Shporer, Tsevi Mazeh, Frederic Pont +4
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 M…
The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b
Joshua N. Winn, Matthew J. Holman, Guillermo Torres +9
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…
The Transit Light Curve Project. VIII. Six Occultations of the Exoplanet TrES-3
Joshua N. Winn, Matthew J. Holman, Avi Shporer +5
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%-confide…
HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field
A. Pal, G. A. Bakos, G. Torres +14
We report on the latest discovery of the HATNet project; a very hot giant planet orbiting a bright (V = 10.5) star with a small semi-major axis of a = 0.0377 +/- 0.0005 AU. Ephemer…
Rotation and Macroturbulence in Metal-poor Field Red Giant and Red Horizontal Branch Stars
Bruce W. Carney, David F. Gray, David Yong +4
We report the results for rotational velocities, Vrot sin i, and macroturbulence dispersion, zeta(RT), for 12 metal-poor field red giant branch stars and 7 metal-poor field red hor…
Observational Tests of Planet Formation Models
A. Sozzetti, G. Torres, D. W. Latham +8
We summarize the results of two experiments to address important issues related to the correlation between planet frequencies and properties and the metallicity of the hosts. Our r…
Kinematics of NGC 2264: signs of cluster formation
Gabor Furesz, Lee W. Hartmann, Andrew H. Szentgyorgyi +7
We present results from 1078 high resolution spectra of 990 stars in the young open cluster NGC 2264, obtained with the Hectochelle multiobject echelle spectrograph on the 6.5m MMT…
New Worlds on the Horizon: Earth-Sized Planets Close to Other Stars
Eric Gaidos, Nader Haghighipour, Eric Agol +3
The search for habitable planets like Earth around other stars fulfils an ancient imperative to understand our origins and place in the cosmos. The past decade has seen the discove…
HAT-P-5b: A Jupiter-like hot Jupiter Transiting a Bright Star
G. A. Bakos, A. Shporer, A. Pal +17
We report the discovery of a planet transiting a moderately bright (V = 12.00) G star, with an orbital period of 2.788491 +/-0.000025 days. From the transit light curve we determin…
HAT-P-4b: A metal-rich low-density transiting hot Jupiter
G. Kovacs, G. A. Bakos, G. Torres +14
We describe the discovery of HAT-P-4b, a low-density extrasolar planet transiting BD+36 2593, a V = 11.2 mag slightly evolved metal-rich late F star. The planet's orbital period is…
HAT-P-6b: A Hot Jupiter transiting a bright F star
R. W. Noyes, G. A. Bakos, G. Torres +17
In the ongoing HATNet survey we have detected a giant planet, with radius 1.33 +/- 0.06 RJup and mass 1.06 +/- 0.12 MJup, transiting the bright (V = 10.5) star GSC 03239-00992. The…
Line Broadening in Field Metal-poor Red Giant and Red Horizontal Branch Stars
Bruce W. Carney, David W. Latham, R. P. Stefanik +1
We report 349 radial velocities for 45 metal-poor field red giant and red horizontal branch stars. We have have identified one new spectroscopic binary, HD 4306, and one possible s…
A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT
Joshua Pepper, K. Z. Stanek, Richard W. Pogge +5
The Kilodegree Extremely Little Telescope (KELT) project is a small aperture, wide-angle search for planetary transits of solar-type stars. In this paper, we present the results of…
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…
TrES-4: A Transiting Hot Jupiter of Very Low Density
Georgi Mandushev, Francis T. O'Donovan, David Charbonneau +12
We report the discovery of TrES-4, a hot Jupiter that transits the star GSC 02620-00648 every 3.55 days. From high-resolution spectroscopy of the star we estimate a stellar effecti…
HAT-P-3b: A heavy-element rich planet transiting a K dwarf star
G. Torres, G. A. Bakos, G. Kovacs +13
We report the discovery of a Jupiter-size planet transiting a relatively bright (V = 11.56) and metal-rich early K dwarf star with a period of about 2.9 days. On the basis of follo…