Showing 2011 · astro-ph.EPShow all

58 papers · 2 filters

astro-ph.EP2011★ 187 cited

Two Earth-sized planets orbiting Kepler-20

Francois Fressin, Guillermo Torres, Jason F. Rowe +33

Since the discovery of the first extrasolar giant planets around Sun-like stars, evolving observational capabilities have brought us closer to the detection of true Earth analogues…

astro-ph.EP2011★ 33 cited

WISE/NEOWISE observations of Active Bodies in the Main Belt

James M. Bauer, A. K. Mainzer, Tommy Grav +22

We report results based on mid-infrared photometry of 5 active main belt objects (AMBOs) detected by the Wide-field Infrared Survey Explorer (WISE) spacecraft. Four of these bodies…

astro-ph.EP2011★ 116 cited

EChO - Exoplanet Characterisation Observatory

G. Tinetti, J. P. Beaulieu, T. Henning +131

A dedicated mission to investigate exoplanetary atmospheres represents a major milestone in our quest to understand our place in the universe by placing our Solar System in context…

astro-ph.EP2011★ 245 cited

Kepler-22b: A 2.4 Earth-radius Planet in the Habitable Zone of a Sun-like Star

William J. Borucki, David G. Koch, Natalie Batalha +80

A search of the time-series photometry from NASA's Kepler spacecraft reveals a transiting planet candidate orbiting the 11th magnitude G5 dwarf KIC 10593626 with a period of 290 da…

astro-ph.EP2011★ 151 cited

Information Content of Exoplanetary Transit Spectra: An Initial Look

M. R. Line, X. Zhang, G. Vaisht +3

It has been shown that spectroscopy of transiting extrasolar planets can potentially provide a wealth of information about their atmospheres. Herein, we set up the inverse problem…

astro-ph.EP2011★ 47 cited

NEOWISE Studies of Asteroids with Sloan Photometry: Preliminary Results

A. Mainzer, J. Masiero, T. Grav +11

We have combined the NEOWISE and Sloan Digital Sky Survey data to study the albedos of 24,353 asteroids with candidate taxonomic classifications derived using Sloan photometry. We…

astro-ph.EP2011★ 15 cited

Ultraviolet Spectroscopy of Asteroid (4) Vesta

Jian-Yang Li, Dennis Bodewits, Lori M. Feaga +6

We report a comprehensive review of the UV-visible spectrum and rotational lightcurve of Vesta combining new observations by Hubble Space Telescope and Swift Gamma-ray Burst Observ…

astro-ph.EP2011★ 27 cited

Gap opening beyond dead zones by photoevaporation

Ryuji Morishima

We propose a new hypothesis for the origin of protoplanetary discs with large inner holes (or gaps), so-called transition discs. Our gas disc model takes into account layered accre…

astro-ph.EP2011★ 68 cited

Searching for faint companions with VLTI/PIONIER. I. Method and first results

Olivier Absil, Jean-Baptiste Le Bouquin, Jean-Philippe Berger +10

Context. A new four-telescope interferometric instrument called PIONIER has recently been installed at VLTI. It provides improved imaging capabilities together with high precision.…

astro-ph.EP2011★ 195 cited

Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

William D. Cochran, Daniel C. Fabrycky, Guillermo Torres +51

We report the detection of three transiting planets around a Sunlike star, which we designate Kepler-18. The transit signals were detected in photometric data from the Kepler satel…

astro-ph.EP2011★ 87 cited

WISE/NEOWISE Observations of the Hilda Population: Preliminary Results

T. Grav, A. K. Mainzer, J. Bauer +14

We present the preliminary analysis of 1023 known asteroids in the Hilda region of the Solar System observed by the NEOWISE component of the Wide-field Infrared Survey Explorer (WI…

astro-ph.EP2011★ 127 cited

WISE/NEOWISE Observations of the Jovian Trojans: Preliminary Results

T. Grav, A. K. Mainzer, J. Bauer +13

We present the preliminary analysis of over 1739 known and 349 candidate Jovian Trojans observed by the NEOWISE component of the Wide-field Infrared Survey Explorer (WISE). With th…

astro-ph.EP2011★ 35 cited

A Hot Gap Around Jupiter's Orbit in the Solar Nebula

N. J. Turner, M. Choukroun, J. Castillo-Rogez +1

The Sun was an order of magnitude more luminous during the first few hundred thousand years of its existence, due in part to the gravitational energy released by material accreting…

astro-ph.EP2011★ 150 cited

NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results

A. Mainzer, T. Grav, J. Masiero +10

The NEOWISE dataset offers the opportunity to study the variations in albedo for asteroid classification schemes based on visible and near-infrared observations for a large sample…

astro-ph.EP2011★ 440 cited

NEOWISE Observations of Near-Earth Objects: Preliminary Results

A. Mainzer, T. Grav, J. Bauer +34

With the NEOWISE portion of the \emph{Wide-field Infrared Survey Explorer} (WISE) project, we have carried out a highly uniform survey of the near-Earth object (NEO) population at…

astro-ph.EP2011★ 57 cited

Toward Direct Detection of Hot Jupiters with Precision Closure Phase: Calibration Studies and First Results from the CHARA Array

M. Zhao, J. D. Monnier, X. Che +12

Direct detection of thermal emission from nearby hot Jupiters has greatly advanced our knowledge of extrasolar planets in recent years. Since hot Jupiter systems can be regarded as…

astro-ph.EP2011★ 64 cited

Ground-based detections of thermal emission from CoRoT-1b and WASP-12b

Ming Zhao, John D. Monnier, Mark R. Swain +2

We report a new detection of the H-band thermal emission of CoRoT-1b and two confirmation detections of the Ks-band thermal emission of WASP-12b at secondary eclipses. The H-band m…

astro-ph.EP2011★ 100 cited

Terrestrial, Habitable-Zone Exoplanet Frequency from Kepler

Wesley A. Traub

Data from Kepler's first 136 days of operation are analyzed to determine the distribution of exoplanets with respect to radius, period, and host-star spectral type. The analysis is…

astro-ph.EP2011★ 442 cited

Main Belt Asteroids with WISE/NEOWISE I: Preliminary Albedos and Diameters

Joseph R. Masiero, A. K. Mainzer, T. Grav +15

We present initial results from the Wide-field Infrared Survey Explorer (WISE), a four-band all-sky thermal infrared survey that produces data well suited to measuring the physical…

astro-ph.EP2011★ 159 cited

Accretion of Saturn's mid-sized moons during the viscous spreading of young massive rings: solving the paradox of silicate-poor rings versus silicate-rich moons

Sébastien Charnoz, Aurélien Crida, Julie C. Castillo-Rogez +7

The origin of Saturn's inner mid-sized moons (Mimas, Enceladus, Tethys, Dione and Rhea) and Saturn's rings is debated. Charnoz et al. (2010) introduced the idea that the smallest i…

astro-ph.EP2011★ 168 cited

Carbon-rich Giant Planets: Atmospheric Chemistry, Thermal Inversions, Spectra, and Formation conditions

Nikku Madhusudhan, Olivier Mousis, Torrence V. Johnson +1

The recent inference of a carbon-rich atmosphere, with C/O >= 1, in the hot Jupiter WASP-12b motivates the exotic new class of carbon-rich planets (CRPs). We report a detailed stud…

astro-ph.EP2011★ 60 cited

Jupiter's Moment of Inertia: A Possible Determination by JUNO

Ravit Helled, John D. Anderson, Gerald Schubert +1

The moment of inertia of a giant planet reveals important information about the planet's internal density structure and this information is not identical to that contained in the g…

astro-ph.EP2011★ 74 cited

Discovery and Atmospheric Characterization of Giant Planet Kepler-12b: An Inflated Radius Outlier

Jonathan J. Fortney, Brice-Olivier Demory, Jean-Michel Desert +34

We report the discovery of planet Kepler-12b (KOI-20), which at 1.695\pm0.030 RJ is among the handful of planets with super-inflated radii above 1.65 RJ. Orbiting its slightly evol…

astro-ph.EP2011★ 87 cited

Hot exozodiacal dust resolved around Vega with IOTA/IONIC

D. Defrère, O. Absil, J. -C. Augereau +10

Although debris discs have been detected around a significant number of main-sequence stars, only a few of them are known to harbour hot dust in their inner part where terrestrial…