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19912026
Showing 2009 · astro-ph.EPShow all

31 papers · 2 filters

astro-ph.EP2009★ 122 cited

A Super-Earth and two Neptunes Orbiting the Nearby Sun-like star 61 Virginis

Steven S. Vogt, Robert A. Wittenmyer, R. Paul Butler +10

We present precision radial velocity (RV) data that reveal a multiple exoplanet system orbiting the bright nearby G5V star 61 Virginis. Our 4.6 years of combined Keck/HIRES and Ang…

astro-ph.EP2009★ 37 cited

A Super-Earth Orbiting the Nearby Sun-like Star HD 1461

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

We present precision radial velocity data that reveal a Super-Earth mass planet and two probable additional planets orbiting the bright nearby G0V star HD 1461. Our 12.8 years of K…

astro-ph.EP2009★ 315 cited

Transmission Spectra of Three-Dimensional Hot Jupiter Model Atmospheres

J. J. Fortney, M. Shabram, A. P. Showman +4

We compute models of the transmission spectra of planets HD 209458b, HD 189733b, and generic hot Jupiters. We examine the effects of temperature, surface gravity, and metallicity f…

astro-ph.EP2009★ 97 cited

Protoplanetary migration in turbulent isothermal disks

C. Baruteau, D. N. C. Lin

In order to reproduce the statistical properties of the observed exoplanets, population synthesis models have shown that the migration of protoplanets should be significantly slowe…

astro-ph.EP2009★ 359 cited

The Interior Structure, Composition, and Evolution of Giant Planets

Jonathan J. Fortney, Nadine Nettelmann

We discuss our current understanding of the interior structure and thermal evolution of giant planets. This includes the gas giants, such as Jupiter and Saturn, that are primarily…

astro-ph.EP2009★ 141 cited

The thermal emission of the young and massive planet CoRoT-2b at 4.5 and 8 microns

M. Gillon, A. A. Lanotte, T. Barman +16

We report measurements of the thermal emission of the young and massive planet CoRoT-2b at 4.5 and 8 microns with the Spitzer Infrared Array Camera (IRAC). Our measured occultation…

astro-ph.EP2009★ 65 cited

Metallicity of the Massive Protoplanets Around HR 8799 If Formed by Gravitational Instability

R. Helled, P. Bodenheimer

The final composition of giant planets formed as a result of gravitational instability in the disk gas depends on their ability to capture solid material (planetesimals) during the…

astro-ph.EP2009★ 23 cited

Tidal and Magnetic Interactions between a Hot Jupiter and its Host Star in the Magnetospheric Cavity of a Protoplanetary Disk

Shih-Hsin Chang, Pin-Gao Gu, Peter Bodenheimer

We present a simplified model to study the orbital evolution of a young hot Jupiter inside the magnetospheric cavity of a proto-planetary disk. The model takes into account the dis…

astro-ph.EP2009★ 57 cited

The Formation of Uranus and Neptune in Solid-Rich Feeding Zones: Connecting Chemistry and Dynamics

Sarah E. Dodson-Robinson, Peter Bodenheimer

The core accretion theory of planet formation has at least two fundamental problems explaining the origins of Uranus and Neptune: (1) dynamical times in the trans-Saturnian solar n…

astro-ph.EP2009★ 75 cited

Spitzer IRAC Secondary Eclipse Photometry of the Transiting Extrasolar Planet HAT-P-1b

Kamen Todorov, Drake Deming, Jospeph Harrington +5

We report Spitzer/IRAC photometry of the transiting giant exoplanet HAT-P-1b during its secondary eclipse. This planet lies near the postulated boundary between the pM and pL-class…

astro-ph.EP2009★ 89 cited

The Case of AB Aurigae's Disk in Polarized Light: Is There Truly a Gap?

Marshall D. Perrin, Glenn Schneider, Gaspard Duchene +4

Using the NICMOS coronagraph, we have obtained high-contrast 2.0 micron imaging polarimetry and 1.1 micron imaging of the circumstellar disk around AB Aurigae on angular scales of…

astro-ph.EP2009★ 83 cited

Refining Exoplanet Ephemerides and Transit Observing Strategies

Stephen R. Kane, Suvrath Mahadevan, Kaspar von Braun +2

Transiting planet discoveries have yielded a plethora of information regarding the internal structure and atmospheres of extra-solar planets. These discoveries have been restricted…

astro-ph.EP2009★ 448 cited

A torque formula for non-isothermal Type I planetary migration - I. Unsaturated horseshoe drag

S. Paardekooper, C. Baruteau, A. Crida +1

We study the torque on low-mass planets embedded in protoplanetary discs in the two-dimensional approximation, incorporating non-isothermal effects. We couple linear estimates of t…

astro-ph.EP2009★ 147 cited

The 8 Micron Phase Variation of the Hot Saturn HD 149026b

Heather A. Knutson, David Charbonneau, Nicolas B. Cowan +4

We monitor the star HD 149026 and its Saturn-mass planet at 8.0 micron over slightly more than half an orbit using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope.…

astro-ph.EP2009★ 68 cited

On the eccentricity of self-gravitating circumstellar disks in eccentric binary systems

F. Marzari, H. Scholl, P. Thebault +1

We study the evolution of circumstellar massive disks around the primary star of a binary system focusing on the computation of disk eccentricity. In particular, we concentrate on…

astro-ph.EP2009★ 106 cited

Determination of the Interior Structure of Transiting Planets in Multiple-Planet Systems

Konstantin Batygin, Peter Bodenheimer, Gregory Laughlin

Tidal dissipation within a short-period transiting extrasolar planet perturbed by a companion object can drive orbital evolution of the system to a so-called tidal fixed point, in…

astro-ph.EP2009★ 155 cited

Systemic: A Testbed For Characterizing the Detection of Extrasolar Planets. I. The Systemic Console Package

Stefano Meschiari, Aaron Wolf, Eugenio Rivera +3

We present the systemic Console, a new all-in-one, general-purpose software package for the analysis and combined multiparameter fitting of Doppler radial velocity (RV) and transit…

astro-ph.EP2009★ 134 cited

Inflating and Deflating Hot Jupiters: Coupled Tidal and Thermal Evolution of Known Transiting Planets

N. Miller, J. J. Fortney, B. Jackson

We examine the radius evolution of close-in giant planets with a planet evolution model that couples the orbital-tidal and thermal evolution. For 45 transiting systems, we compute…

astro-ph.EP2009★ 49 cited

Planetesimal and Protoplanet Dynamics in a Turbulent Protoplanetary Disk: Ideal Unstratified Disks

Chao-Chin Yang, Mordecai-Mark Mac Low, Kristen Menou

The dynamics of planetesimals and planetary cores may be strongly influenced by density perturbations driven by magneto-rotational turbulence in their natal protoplanetary gas disk…

astro-ph.EP2009★ 56 cited

A Quasi-Stationary Solution to Gliese 436b's Eccentricity

Konstantin Batygin, Gregory Laughlin, Stefano Meschiari +3

We investigate the possibility that the large orbital eccentricity of the transiting Neptune-mass planet Gliese 436b is maintained in the face of tidal dissipation by a second plan…

astro-ph.EP2009★ 38 cited

OSETI with STACEE: A Search for Nanosecond Optical Transients from Nearby Stars

D. S. Hanna, J. Ball, C. E. Covault +13

We have used the STACEE high-energy gamma-ray detector to look for fast blue-green laser pulses from the vicinity of 187 stars. The STACEE detector offers unprecedented light-colle…

astro-ph.EP2009★ 36 cited

Detectability of Terrestrial Planets in Multi-Planet Systems: Preliminary Report

Wesley A. Traub, Charles Beichman, Andrew F. Boden +21

We ask if Earth-like planets (terrestrial mass and habitable-zone orbit) can be detected in multi-planet systems, using astrometric and radial velocity observations. We report here…

astro-ph.EP2009★ 24 cited

Old, Rich, and Eccentric: Two Jovian Planets Orbiting Evolved Metal-Rich Stars

Kathryn M. G. Peek, John Asher Johnson, Debra A. Fischer +10

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…

astro-ph.EP2009★ 35 cited

Formation and Detection of Earth Mass Planets around Low Mass Stars

Ryan Montgomery, Greg Laughlin

We investigate an in-situ formation scenario for Earth-mass terrestrial planets in short-period, potentially habitable orbits around low-mass stars (M_star < 0.3 M_sun). We then in…