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19912026
Showing 2010 · astro-ph.EPShow all

49 papers · 2 filters

astro-ph.EP2010★ 191 cited

Consequences of the Ejection and Disruption of Giant Planets

James Guillochon, Enrico Ramirez-Ruiz, Douglas N. C. Lin

The discovery of Jupiter-mass planets in close orbits about their parent stars has challenged models of planet formation. Recent observations have shown that a number of these plan…

astro-ph.EP2010★ 150 cited

The GJ1214 Super-Earth System: Stellar Variability, New Transits, and a Search for Additional Planets

Zachory K. Berta, David Charbonneau, Jacob Bean +5

The super-Earth GJ1214b transits a nearby M dwarf that exhibits 1% intrinsic variability in the near-infrared. Here, we analyze new observations to refine the physical properties o…

astro-ph.EP2010★ 393 cited

A ground-based transmission spectrum of the super-Earth exoplanet GJ1214b

Jacob L. Bean, Eliza Miller-Ricci Kempton, Derek Homeier

In contrast to planets with masses similar to that of Jupiter and higher, the bulk compositions of planets in the so-called super-Earth regime cannot be uniquely determined from a…

astro-ph.EP2010★ 88 cited

Transmission Spectra of Transiting Planet Atmospheres: Model Validation and Simulations of the Hot Neptune GJ 436b for JWST

Megan Shabram, Jonathan J. Fortney, Thomas P. Greene +1

We explore the transmission spectrum of the Neptune-class exoplanet GJ 436b, including the possibility that its atmospheric opacity is dominated by a variety of non- equilibrium ch…

astro-ph.EP2010★ 45 cited

The Lick-Carnegie Survey: Four New Exoplanet Candidates

Stefano Meschiari, Gregory Laughlin, Steven S. Vogt +4

We present new precise HIRES radial velocity (RV) data sets of five nearby stars obtained at Keck Observatory. HD 31253, HD 218566, HD 177830, HD 99492 and HD 74156 are host stars…

astro-ph.EP2010★ 77 cited

Secondary Eclipse Photometry of WASP-4b with Warm Spitzer

Ingrid M. Beerer, Heather A. Knutson, Adam Burrows +10

We present photometry of the giant extrasolar planet WASP-4b at 3.6 and 4.5 micron taken with the Infrared Array Camera on board the Spitzer Space Telescope as part of Spitzer's ex…

astro-ph.EP2010

System Geometries and Transit / Eclipse Probabilities

Kaspar von Braun, Stephen R. Kane, Suvrath Mahadevan +3

Transiting exoplanets provide access to data to study the mass-radius relation and internal structure of extrasolar planets. Long-period transiting planets allow insight into plane…

astro-ph.EP2010★ 91 cited

Warm Spitzer Photometry of the Transiting Exoplanets CoRoT-1 and CoRoT-2 at Secondary Eclipse

Drake Deming, Heather Knutson, Eric Agol +9

We measure secondary eclipses of the hot giant exoplanets CoRoT-1 at 3.6 and 4.5 microns, and CoRoT-2 at 3.6 microns, both using Warm Spitzer. We find that the Warm Spitzer mission…

astro-ph.EP2010

Improving Transit Predictions of Known Exoplanets with TERMS

Stephen R. Kane, David Ciardi, Debra Fischer +7

Transiting planet discoveries have largely been restricted to the short-period or low-periastron distance regimes due to the bias inherent in the geometric transit probability. Thr…

astro-ph.EP2010★ 646 cited

The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters

Andrew W. Howard, Geoffrey W. Marcy, John Asher Johnson +7

The questions of how planets form and how common Earth-like planets are can be addressed by measuring the distribution of exoplanet masses and orbital periods. We report the occurr…

astro-ph.EP2010

Composition of Massive Giant Planets

Ravit Helled, Peter Bodenheimer, Jack J. Lissauer

The two current models for giant planet formation are core accretion and disk instability. We discuss the core masses and overall planetary enrichment in heavy elements predicted b…

astro-ph.EP2010★ 65 cited

A Population of Very-Hot Super-Earths in Multiple-Planet Systems Should be Uncovered by Kepler

Kevin C. Schlaufman, D. N. C. Lin, S. Ida

We simulate a Kepler-like observation of a theoretical exoplanet population and we show that the observed orbital period distribution of the Kepler giant planet candidates is best…

astro-ph.EP2010★ 109 cited

Three-dimensional Disk-Planet Torques in a Locally Isothermal Disk

Gennaro D'Angelo, Stephen H. Lubow

We determine an expression for the Type I planet migration torque involving a locally isothermal disk, with moderate turbulent viscosity (~0.0005 < alpha < ~0.05), based on three-d…

astro-ph.EP2010★ 91 cited

Gliese 581g as a scaled-up version of Earth: atmospheric circulation simulations

Kevin Heng, Steven S. Vogt

We use three-dimensional simulations to study the atmospheric circulation on the first Earth-sized exoplanet discovered in the habitable zone of an M star. We treat Gliese 581g as…

astro-ph.EP2010★ 198 cited

Thermal evolution and structure models of the transiting super-Earth GJ 1214b

N. Nettelmann, J. J. Fortney, U. Kramm +1

The planet GJ 1214b is the second known super-Earth with a measured mass and radius. Orbiting a quiet M-star, it receives considerably less mass-loss driving X-ray and UV radiation…

astro-ph.EP2010★ 195 cited

The Lick-Carnegie Exoplanet Survey: A 3.1 M_Earth Planet in the Habitable Zone of the Nearby M3V Star Gliese 581

Steven S. Vogt, R. Paul Butler, Eugenio J. Rivera +3

We present 11 years of HIRES precision radial velocities (RV) of the nearby M3V star Gliese 581, combining our data set of 122 precision RVs with an existing published 4.3-year set…

astro-ph.EP2010★ 152 cited

Exoplanet albedo spectra and colors as a function of planet phase, separation, and metallicity

Kerri L. Cahoy, Mark S. Marley, Jonathan J. Fortney

First generation optical coronagraphic telescopes will obtain images of cool gas and ice giant exoplanets around nearby stars. The albedo spectra of exoplanets at planet-star separ…

astro-ph.EP2010★ 9 cited

A Scientometric Prediction of the Discovery of the First Potentially Habitable Planet with a Mass Similar to Earth

Samuel Arbesman, Gregory Laughlin

The search for a habitable extrasolar planet has long interested scientists, but only recently have the tools become available to search for such planets. In the past decades, the…

astro-ph.EP2010★ 109 cited

Near-infrared Thermal Emission from WASP-12b: detections of the secondary eclipse in Ks, H & J

Bryce Croll, David Lafreniere, Loic Albert +3

We present Ks, H & J-band photometry of the very highly irradiated hot Jupiter WASP-12b using the Wide-field Infrared Camera on the Canada-France-Hawaii telescope. Our photometry b…

astro-ph.EP2010★ 44 cited

Probing potassium in the atmosphere of HD 80606b with tunable filter transit spectrophotometry from the Gran Telescopio Canarias

Knicole D. Colon, Eric B. Ford, Seth Redfield +4

We report observations of HD 80606 using the 10.4-m Gran Telescopio Canarias (GTC) and the OSIRIS tunable filter imager. We acquired very-high-precision, narrow-band photometry in…

astro-ph.EP2010★ 146 cited

Gran Telescopio Canarias OSIRIS Transiting Exoplanet Atmospheric Survey: Detection of potassium in XO-2b from narrowband spectrophotometry

D. K. Sing, J. -M. Desert, J. J. Fortney +8

We present Gran Telescopio Canarias (GTC) optical transit narrow-band photometry of the hot-Jupiter exoplanet XO-2b using the OSIRIS instrument. This unique instrument has the capa…

astro-ph.EP2010★ 209 cited

Evolution of Spin Direction of Accreting Magnetic Protostars and Spin-Orbit Misalignment in Exoplanetary Systems

Dong Lai, Francois Foucart, Douglas N. C. Lin

Recent observations have shown that in many exoplanetary systems the spin axis of the parent star is misaligned with the planet's orbital axis. These have been used to argue agains…

astro-ph.EP2010★ 24 cited

Embryo impacts and gas giant mergers I: Dichotomy of Jupiter and Saturn's core mass

Shu Lin Li, C. B. Agnor, D. N. C. Lin

Interior to the gaseous envelopes of Saturn, Uranus, and Neptune, there are high-density cores with masses larger than 10 Earth masses. According to the conventional sequential acc…

astro-ph.EP2010★ 114 cited

Retired A Stars and Their Companions VI. A Pair of Interacting Exoplanet Pairs Around the Subgiants 24 Sextanis and HD200964

John Asher Johnson, Matthew Payne, Andrew W. Howard +10

We report radial velocity measurements of the G-type subgiants 24 Sextanis (=HD90043) and HD200964. Both are massive, evolved stars that exhibit periodic variations due to the pres…