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29 papers · 2 filters
The HARPS search for southern extra-solar planets XXXVI: Five new long-period giant planets and a system update
C. Moutou, G. Lo Curto, M. Mayor +10
We describe radial-velocity time series obtained by HARPS on the 3.60 m telescope in La Silla (ESO, Chile) over ten years and report the discovery of five new giant exoplanets in d…
New Insights on Jupiter's Deep Water Abundance from Disequilibrium Species
Dong Wang, Peter Gierasch, Jonathan Lunine +1
The bulk water abundance on Jupiter potentially constrains the planet's formation conditions. We improve the chemical constraints on Jupiter's deep water abundance in this paper. T…
Evolution of angular-momentum-losing exoplanetary systems : Revisiting Darwin stability
C. Damiani, A. F. Lanza
We assess the importance of tidal evolution and its interplay with magnetic braking in the population of hot-Jupiter planetary systems. By minimizing the total mechanical energy of…
SOPHIE velocimetry of Kepler transit candidates XIV. A joint photometric, spectroscopic, and dynamical analysis of the Kepler-117 system
G. Bruno, J. -M. Almenara, S. C. C. Barros +9
As part of our follow-up campaign of Kepler planets, we observed Kepler-117 with the SOPHIE spectrograph at the Observatoire de Haute-Provence. This F8-type star hosts two transiti…
Characterization of the four new transiting planets KOI-188b, KOI-195b, KOI-192b, and KOI-830b
G. Hebrard, A. Santerne, G. Montagnier +10
The characterization of four new transiting extrasolar planets is presented here. KOI-188b and KOI-195b are bloated hot Saturns, with orbital periods of 3.8 and 3.2 days, and masse…
Near-infrared Thermal Emission Detections of a number of hot Jupiters and the Systematics of Ground-based Near-infrared Photometry
Bryce Croll, Loic Albert, Ray Jayawardhana +7
We present detections of the near-infrared thermal emission of three hot Jupiters and one brown-dwarf using the Wide-field Infrared Camera (WIRCam) on the Canada-France-Hawaii Tele…
Performance of the VLT Planet Finder SPHERE I. Photometry and astrometry precision with IRDIS and IFS in laboratory
A. Zurlo, A. Vigan, D. Mesa +26
The new planet finder for the Very Large Telescope (VLT), the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE), just had its first light in Paranal. A dedicated instr…
WASP-104b and WASP-106b: two transiting hot Jupiters in 1.75-day and 9.3-day orbits
A. M. S. Smith, D. R. Anderson, D. J. Armstrong +29
We report the discovery from the WASP survey of two exoplanetary systems, each consisting of a Jupiter-sized planet transiting an 11th magnitude (V) main-sequence star. WASP-104b o…
CoRoT-22 b: a validated 4.9 RE exoplanet in 10-day orbit
C. Moutou, J-M. Almenara, R. F. Diaz +36
The CoRoT satellite has provided high-precision photometric light curves for more than 163,000 stars and found several hundreds of transiting systems compatible with a planetary sc…
Revisiting the transits of CoRoT-7b at a lower activity level
S. C. C. Barros, J. M. Almenara, M. Deleuil +29
CoRoT-7b, the first super-Earth with measured radius discovered, has opened the new field of rocky exoplanets characterisation. To better understand this interesting system, new ob…
Similar origin for low- and high-albedo Jovian Trojans and Hilda asteroids ?
Michaël Marsset, Pierre Vernazza, Florian Gourgeot +4
Hilda asteroids and Jupiter Trojans are two low-albedo (p ~ 0.07) populations for which the Nice model predicts an origin in the primordial Kuiper Belt region. However, r…
Improvements on analytic modelling of stellar spots
M. Montalto, G. Boué, M. Oshagh +3
In this work we present the solution of the stellar spot problem using the Kelvin-Stokes theorem. Our result is applicable for any given location and dimension of the spots on the…
Planets and Stellar Activity: Hide and Seek in the CoRoT-7 system
R. D. Haywood, A. Collier Cameron, D. Queloz +12
Since the discovery of the transiting super-Earth CoRoT-7b, several investigations have yielded different results for the number and masses of planets present in the system, mainly…
Transiting exoplanets from the CoRoT space mission: XXVI. CoRoT-24: A transiting multi-planet system
R. Alonso, C. Moutou, M. Endl +48
We present the discovery of a candidate multiply-transiting system, the first one found in the CoRoT mission. Two transit-like features with periods of 5.11 and 11.76d are detected…
Water Ice and Dust in the Innermost Coma of Comet 103P/Hartley 2
Silvia Protopapa, Jessica M. Sunshine, Lori M. Feaga +7
On November 4th, 2010, the Deep Impact eXtended Investigation (DIXI) successfully encountered comet 103P/Hartley 2, when it was at a heliocentric distance of 1.06 AU. Spatially res…
SOPHIE velocimetry of Kepler transit candidates XII. KOI-1257 b: a highly eccentric three-month period transiting exoplanet
A. Santerne, G. Hébrard, M. Deleuil +36
In this paper we report a new transiting warm giant planet: KOI-1257 b. It was first detected in photometry as a planet-candidate by the space telescope and then val…
The albedo-color diversity of transneptunian objects
Pedro Lacerda, Sonia Fornasier, Emmanuel Lellouch +9
We analyze albedo data obtained using the Herschel Space Observatory that reveal the existence of two distinct types of surface among midsized transneptunian objects. A color-albed…
Multiple and Fast: The Accretion of Ordinary Chondrite Parent Bodies
P. Vernazza, B. Zanda, R. P. Binzel +7
Although petrologic, chemical and isotopic studies of ordinary chondrites and meteorites in general have largely helped establish a chronology of the earliest events of planetesima…
The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs at wide orbits: II- Survey description, results and performances
G. Chauvin, A. Vigan, M. Bonnefoy +29
In anticipation of the VLT/SPHERE planet imager guaranteed time programs, we have conducted a preparatory survey of 86 stars between 2009 and 2013 in order to identify new faint co…
The VLT/NaCo Large program to probe the occurrence of exoplanets and brown dwarfs in wide orbits: I- Sample definition and characterization
S. Desidera, E. Covino, S. Messina +28
Young, nearby stars are ideal targets to search for planets using the direct imaging technique. The determination of stellar parameters is crucial for the interpretation of imaging…
Density, porosity, mineralogy, and internal structure of cosmic dust and alteration of its properties during high velocity atmospheric entry
T. Kohout, A. Kallonen, J. -P. Suuronen +6
X-ray microtomography (XMT), X-ray diffraction (XRD) and magnetic hysteresis measurements were used to determine micrometeorite internal structure, mineralogy, crystallography, and…
The HARPS search for southern extra-solar planets XXXV. The interesting case of HD41248: stellar activity, no planets?
N. C. Santos, A. Mortier, J. P. Faria +21
The search for planets orbiting metal-poor stars is of uttermost importance for our understanding of the planet formation models. However, no dedicated searches have been conducted…
PASTIS: Bayesian extrasolar planet validation. I. General framework, models, and performance
Rodrigo F. Díaz, José M. Almenara, Alexandre Santerne +3
A large fraction of the smallest transiting planet candidates discovered by the Kepler and CoRoT space missions cannot be confirmed by a dynamical measurement of the mass using cur…
A Window on Exoplanet Dynamical Histories: Rossiter-McLaughlin Observations of WASP-13b and WASP-32b
R. D. Brothwell, C. A. Watson, G. Hebrard +42
We present Rossiter-McLaughlin observations of WASP-13b and WASP-32b and determine the sky-projected angle between the normal of the planetary orbit and the stellar rotation axis (…