output
19912026
Showing 2012 · astro-ph.EPShow all

48 papers · 2 filters

astro-ph.EP2012★ 183 cited

Near Earth Asteroids with measurable Yarkovsky effect

D. Farnocchia, S. R. Chesley, D. Vokrouhlicky +2

We seek evidence of the Yarkovsky effect among Near Earth Asteroids (NEAs) by measuring the Yarkovsky-related orbital drift from the orbital fit. To prevent the occurrence of unrel…

astro-ph.EP2012★ 119 cited

On The Relative Sizes of Planets Within Kepler Multiple Candidate Systems

David R. Ciardi, Daniel C. Fabrycky, Eric B. Ford +5

We present a study of the relative sizes of planets within the multiple candidate systems discovered with the mission. We have compared the size of each planet to the size…

astro-ph.EP2012★ 55 cited

Ground-based near-infrared observations of water vapour in the Venus troposphere

S. Chamberlain, J. A. Bailey, D. Crisp +1

We present a study of water vapour in the Venus troposphere obtained by modelling specific water vapour absorption bands within the 1.18 μm window. We compare the results with the…

astro-ph.EP2012★ 88 cited

A DEBRIS Disk Around The Planet Hosting M-star GJ581 Spatially Resolved with Herschel

J. -F. Lestrade, B. C. Matthews, B. Sibthorpe +17

Debris disks have been found primarily around intermediate and solar mass stars (spectral types A-K) but rarely around low mass M-type stars. We have spatially resolved a debris di…

astro-ph.EP2012★ 77 cited

A Search for Giant Planet Companions to T Tauri Stars

Christopher J. Crockett, Naved I. Mahmud, L. Prato +4

We present results from an ongoing multiwavelength radial velocity (RV) survey of the Taurus-Auriga star forming region as part of our effort to identify pre--main sequence giant p…

astro-ph.EP2012★ 68 cited

Looking for a Pulse: A search for Rotationally Modulated Radio Emission from the Hot Jupiter, Tau Bootis b

G. Hallinan, S. K. Sirothia, A. Antonova +5

Hot Jupiters have been proposed as a likely population of low frequency radio sources due to electron cyclotron maser emission of similar nature to that detected from the auroral r…

astro-ph.EP2012★ 68 cited

The Structure of Pre-transitional Protoplanetary Disks I: Radiative Transfer Modeling of the Disk+Cavity in the PDS 70 system

Ruobing Dong, Jun Hashimoto, Roman Rafikov +49

Through detailed radiative transfer modeling, we present a disk+cavity model to simultaneously explain both the SED and Subaru H-band polarized light imaging for the pre-transition…

astro-ph.EP2012★ 49 cited

Bodily tides near the 1:1 spin-orbit resonance. Correction to Goldreich's dynamical model

James G. Williams, Michael Efroimsky

Spin-orbit coupling is often described in the "MacDonald torque" approach which has become the textbook standard. Within this method, a concise expression for the additional tidal…

astro-ph.EP2012★ 63 cited

Physical Parameters of Asteroids Estimated from the WISE 3 Band Data and NEOWISE Post-Cryogenic Survey

A. Mainzer, T. Grav, J. Masiero +7

Enhancements to the science data processing pipeline of NASA's Wide-field Infrared Explorer (WISE) mission, collectively known as NEOWISE, resulted in the detection of 158,000 m…

astro-ph.EP2012★ 114 cited

Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-Cryogenic Observations of Main Belt Asteroids

Joseph R. Masiero, A. K. Mainzer, T. Grav +4

We present preliminary diameters and albedos for 13511 MBAs that were observed during the 3-Band Cryo phase of the WISE survey (after the outer cryogen tank was exhausted) and as p…

astro-ph.EP2012★ 35 cited

Characterization of Active Main Belt Object P/2012 F5 (Gibbs): A Possible Impacted Asteroid

R. Stevenson, E. A. Kramer, J. M. Bauer +2

In this work we characterize the recently discovered active main belt object P/2012 F5 (Gibbs), which was discovered with a dust trail > 7' in length in the outer main belt, 7 mont…

astro-ph.EP2012★ 52 cited

A Common Proper Motion Stellar Companion to HAT-P-7

Norio Narita, Yasuhiro H. Takahashi, Masayuki Kuzuhara +51

We report that HAT-P-7 has a common proper motion stellar companion. The companion is located at arcsec to the east and estimated as an M5.5V dwarf based on its colors. W…

astro-ph.EP2012★ 16 cited

Regolith grain sizes of Saturn's rings inferred from Cassini-CIRS far-infrared spectra

Ryuji Morishima, Scott G. Edgington, Linda Spilker

We analyze far-infrared (10-650 cm) emissivity spectra of Saturn's main rings obtained by the Cassini Composite Infrared Spectrometer (CIRS). In modeling of the spectra, the…

astro-ph.EP2012★ 19 cited

A multilayer model for thermal infrared emission of Saturn's rings. III: Thermal inertia inferred from Cassini CIRS

Ryuji Morishima, Linda Spilker, Keiji Ohtsuki

The thermal inertia values of Saturn's main rings (the A, B, and C rings and the Cassini division) are derived by applying our thermal model to azimuthally scanned spectra taken by…

astro-ph.EP2012★ 25 cited

WISE/NEOWISE Preliminary Analysis and Highlights of the 67P/Churyumov-Gerasimenko Near Nucleus Environs

James M. Bauer, Emily Kramer, A. K. Mainzer +15

On January 18-19 and June 28-29 of 2010, the Wide-field Infrared Survey Explorer (WISE) spacecraft imaged the Rosetta mission target, comet 67P/Churyumov-Gerasimenko. We present a…

astro-ph.EP2012★ 14 cited

Near-Nucleus Photometry of Outbursting Comet 17P/Holmes

Rachel Stevenson, David Jewitt

Comet 17P/Holmes underwent the largest cometary outburst in recorded history on UT 2007 Oct. 23, releasing massive quantities of dust and gas. We used the Canada-France-Hawaii tele…

astro-ph.EP2012★ 121 cited

WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy

Tommy Grav, Amy K. Mainzer, James M. Bauer +2

We present updated/new thermal model fits for 478 Jovian Trojan asteroids observed with the Wide-field Infrared Survey Explorer (WISE). Using the fact that the two shortest bands u…

astro-ph.EP2012★ 54 cited

Revising the age for the Baptistina asteroid family using WISE/NEOWISE data

Joseph R. Masiero, A. K. Mainzer, T. Grav +2

We have used numerical routines to model the evolution of a simulated Baptistina family to constrain its age in light of new measurements of the diameters and albedos of family mem…

astro-ph.EP2012★ 23 cited

Composition of Near-Earth Asteroid 2008 EV5: Potential target for Robotic and Human Exploration

Vishnu Reddy, Lucille Le Corre, Michael Hicks +5

We observed potentially hazardous asteroid (PHA) 2008 EV5 in the visible (0.30-0.92 microns) and near-IR (0.75-2.5 microns) wavelengths to determine its surface composition. This a…

astro-ph.EP2012★ 87 cited

Planetesimal Compositions in Exoplanet Systems

Torrence V. Johnson, Olivier Mousis, Jonathan I. Lunine +1

We have used recent surveys of the composition of exoplanet host stars to investigate the expected composition of condensed material in planetesimals formed beyond the snow line in…

astro-ph.EP2012★ 13 cited

Direct imaging of extra-solar planets in star forming regions: Lessons learned from a false positive around IM Lup

Dimitri Mawet, Olivier Absil, Guillaume Montagnier +8

Most exoplanet imagers consist of ground-based adaptive optics coronagraphic cameras which are currently limited in contrast, sensitivity and astrometric precision, but advantageou…

astro-ph.EP2012★ 33 cited

Precision Near Infrared Photometry For Exoplanet Transit Observations - I : Ensemble Spot Photometry for An All-Sky Survey

C. Clanton, C. Beichman, G. Vasisht +2

Near-IR observations are important for the detection and characterization of exoplanets using the transit technique, either in surveys of large numbers of stars or for follow-up sp…

astro-ph.EP2012★ 20 cited

The Yarkovsky Drift's Influence on NEAs: Trends and Predictions with NEOWISE Measurements

C. R. Nugent, A. Mainzer, J. Masiero +2

We used WISE-derived geometric albedos (p_V) and diameters, as well as geometric albedos and diameters from the literature, to produce more accurate diurnal Yarkovsky drift predict…

astro-ph.EP2012★ 134 cited

Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems

M. C. Wyatt, G. Kennedy, B. Sibthorpe +15

This paper describes Herschel observations of the nearby (8.5pc) G5V multi-exoplanet host star 61 Vir at 70-500micron carried out by the DEBRIS survey. These reveal emission that i…