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11 papers · 2 filters
Evolution of the protolunar disk: dynamics, cooling timescale and implantation of volatiles onto the Earth
Charnoz Charnoz, Chloe Michaut
It is thought that the Moon accreted from the protolunar disk that was assembled after the last giant impact on Earth. Due to its high temperature, the protolunar disk may act as a…
Discovery of Seven Companions to Intermediate Mass Stars with Extreme Mass Ratios in the Scorpius-Centaurus Association
Sasha Hinkley, Adam L. Kraus, Michael J. Ireland +6
We report the detection of seven low mass companions to intermediate-mass stars (SpT B/A/F; 1.5-4.5 solar masses) in the Scorpius-Centaurus Association using nonredunda…
Results of two multi-chord stellar occultations by dwarf planet (1) Ceres
A. R. Gomes-Júnior, B. L. Giacchini, F. Braga-Ribas +24
We report the results of two multi-chord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. F…
Methane storms as a driver of Titan's dune orientation
Benjamin Charnay, Erika Barth, Scot Rafkin +5
Titan's equatorial regions are covered by eastward propagating linear dunes. This direction is opposite to mean surface winds simulated by Global Climate Models (GCMs), which are o…
Transiting exoplanets from the CoRoT space mission XXVII. CoRoT-28b, a planet orbiting an evolved star, and CoRoT-29b, a planet showing an asymmetric transit
J. Cabrera, Sz. Csizmadia, G. Montagnier +50
Context. We present the discovery of two transiting extrasolar planets by the satellite CoRoT. Aims. We aim at a characterization of the planetary bulk parameters, which allow us t…
Growth of calcium-aluminum-rich inclusions by coagulation and fragmentation in a turbulent protoplanetary disk: observations and modelisation
S. Charnoz, J. Aleon, N. Chaumard +2
Whereas it is generally accepted that calcium-aluminum-rich inclusions (CAIs) from chondritic meteorites formed in a hot environment in the solar protoplanetary disk, the condition…
Time evolution of snow regions and planet traps in an evolving protoplanetary disk
Kévin Baillié, Sébastien Charnoz, Éric Pantin
Aims. We track the time evolution of planet traps and snowlines in a viscously evolving protoplanetary disk using an opacity table that accounts for the composition of the dust mat…
VUV-absorption cross section of CO2 at high temperatures and impact on exoplanet atmospheres
Olivia Venot, Nicolas Fray, Yves Bénilan +6
Ultraviolet (UV) absorption cross sections are an essential ingredient of photochemical atmosphere models. Exoplanet searches have unveiled a large population of short-period objec…
Detection and characterization of Io's atmosphere from high-resolution 4-μm spectroscopy
E. Lellouch, M. Ali-Dib, K. -L. Jessup +3
We report on high-resolution and spatially-resolved spectra of Io in the 4.0 μm region, recorded with the VLT/CRIRES instrument in 2008 and 2010, which provide the first detection…
The non-convex shape of (234) Barbara, the first Barbarian
P. Tanga, B. Carry, F. Colas +37
Asteroid (234) Barbara is the prototype of a category of asteroids that has been shown to be extremely rich in refractory inclusions, the oldest material ever found in the Solar Sy…
Short-term variability on the surface of (1) Ceres. A changing amount of water ice?
D. Perna, Z. Kaňuchová, S. Ieva +5
Context: The dwarf planet (1) Ceres - next target of the NASA Dawn mission - is the largest body in the asteroid main belt; although several observations of this body have been per…