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42 papers · 2 filters
Exo-Milankovitch Cycles I: Orbits and Rotation States
Russell Deitrick, Rory Barnes, Thomas R. Quinn +3
The obliquity of the Earth, which controls our seasons, varies by only ~2.5 degrees over ~40,000 years, and its eccentricity varies by only ~0.05 over 100,000 years. Nonetheless, t…
Rotationally-resolved spectroscopy of Jupiter Trojans (624) Hektor and (911) Agamemnon
Davide Perna, Nicolas Bott, Tetiana Hromakina +3
We present the first-ever rotationally resolved spectroscopic investigation of (624) Hektor and (911) Agamemnon, the two largest Jupiter Trojans. The visible and near-infrared spec…
New spectro-photometric characterization of the substellar object HR 2562 B using SPHERE
D. Mesa, J. -L. Baudino, B. Charnay +32
HR2562 is an F5V star located at ~33 pc from the Sun hosting a substellar companion that was discovered using the GPI instrument. The main objective of the present paper is to prov…
Photometric observations of nine Transneptunian objects and Centaurs
T. Hromakina, D. Perna, I. Belskaya +3
We present the results of photometric observations of six Transneptunian objects and three Centaurs, estimations of their rotational periods and corresponding amplitudes. For six o…
Simultaneous, Multi-Wavelength Variability Characterization of the Free-Floating Planetary Mass Object PSO J318.5-22
Beth Biller, Johanna Vos, Esther Buenzli +15
We present simultaneous HST WFC3 + Spitzer IRAC variability monitoring for the highly-variable young (20 Myr) planetary-mass object PSO J318.5-22. Our simultaneous HST + Spit…
Chromium isotopic homogeneity between the Moon, the Earth, and enstatite chondrites
Berengere Mougel, Frederic Moynier, Christa Gopel
Among the elements exhibiting non-mass dependent isotopic variations in meteorites, chromium (Cr) has been central in arguing for an isotopic homogeneity between the Earth and the…
Habitability in Brown Dwarf Systems
Emeline Bolmont
The very recent discovery of planets orbiting very low mass stars sheds light on these exotic objects. Planetary systems around low-mass stars and brown dwarfs are very different f…
Discovery of a point-like source and a third spiral arm in the transition disk around the Herbig Ae star MWC 758
M. Reggiani, V. Christiaens, O. Absil +20
Transition disks offer the extraordinary opportunity to look for newly born planets and investigate the early stages of planet formation. In this context we observed the Herbig A5…
A self-consistent cloud model for brown dwarfs and young giant exoplanets: comparison with photometric and spectroscopic observations
Benjamin Charnay, Bruno Bézard, Jean-Loup Baudino +3
We developed a simple, physical and self-consistent cloud model for brown dwarfs and young giant exoplanets. We compared different parametrisations for the cloud particle size, by…
Laboratory simulations of the Vis-NIR spectra of comet 67P using sub-μm sized cosmochemical analogues
Batiste Rousseau, Stéphane Érard, Pierre Beck +15
Laboratory spectral measurements of relevant analogue materials were performed in the framework of the Rosetta mission in order to explain the surface spectral properties of comet…
Refurbishing Voyager 1 & 2 Planetary Radio Astronomy (PRA) Data
Baptiste Cecconi, Anaïs Pruvot, Laurent Lamy +5
Voyager/PRA (Planetary Radio Astronomy) data from digitized tapes archived at CNES have been reprocessed and recalibrated. The data cover the Jupiter and Saturn flybys of both Voya…
Evidence of sub-surface energy storage in comet 67P from the outburst of 2016 July 3
J. Agarwal, V. Della Corte, P. D. Feldman +67
On 3 July 2016, several instruments on board ESA's Rosetta spacecraft detected signs of an outburst event on comet 67P, at a heliocentric distance of 3.32 AU from the sun, outbound…
Toward the analysis of JWST exoplanet spectra: Identifying troublesome model parameters
Jean-Loup Baudino, Paul Molliere, Olivia Venot +3
Given the forthcoming launch of the James Webb Space Telescope (JWST) which will allow observ- ing exoplanet atmospheres with unprecedented signal-over-noise ratio, spectral covera…
A history of violence: insights into post-accretionary heating in carbonaceous chondrites from volatile element abundances, Zn isotopes, and water contents
Brandon Mahan, Frederic Moynier, Pierre Beck +2
Carbonaceous chondrites (CCs) may have been the carriers of water, volatile and moderately volatile elements to Earth. Investigating the abundances of these elements, their relativ…
The circumstellar disk HD169142: gas, dust and planets acting in concert?
A. Pohl, M. Benisty, P. Pinilla +33
HD169142 is an excellent target to investigate signs of planet-disk interaction due to the previous evidence of gap structures. We performed J-band (~1.2μm) polarized intensity…
Three years of SPHERE: the latest view of the morphology and evolution of protoplanetary discs
Antonio Garufi, Myriam Benisty, Tomas Stolker +11
Spatially resolving the immediate surroundings of young stars is a key challenge for the planet formation community. SPHERE on the VLT represents an important step forward by incre…
Asteroid (21) Lutetia: Disk-resolved Photometric Analysis of Baetica Region
P. H. Hasselmann, M. A. Barucci, S. Fornasier +4
(21) Lutetia has been visited by Rosetta mission on July 2010 and observed with a phase angle ranging from 0.15 to 156.8 degrees. The Baetica region, located at the north pole has…
Seasonal evolution of , , and abundances in Titan's lower stratosphere
M. Sylvestre, N. A. Teanby, S. Vinatier +2
We study the seasonal evolution of Titan's lower stratosphere (around 15~mbar) in order to better understand the atmospheric dynamics and chemistry in this part of the atmosphere.…
The thermal emission of Centaurs and Trans-Neptunian objects at millimeter wavelengths from ALMA observations
E. Lellouch, R. Moreno, T. Müller +9
The sensitivity of ALMA makes it possible to detect thermal mm/submm emission from small/distant Solar System bodies at the sub-mJy level. Measured fluxes are primarily sensitive t…
The HIP 79977 debris disk in polarized light
N. Engler, H. M. Schmid, Ch. Thalmann +40
We present observations of the known edge-on debris disk around HIP 79977 (HD 146897, F star in Upper Sco, 123 pc), taken with the ZIMPOL differential polarimeter of the SPHERE ins…
Investigation of the inner structures around HD169142 with VLT/SPHERE
R. Ligi, A. Vigan, R. Gratton +47
We present observations of the Herbig Ae star HD169142 with VLT/SPHERE instruments InfraRed Dual-band Imager and Spectrograph (IRDIS) ( and bands) and the Integral Fie…
Size and shape of Chariklo from multi-epoch stellar occultations
R Leiva, B Sicardy, J I B Camargo +28
We use data from five stellar occultations observed between 2013 and 2016 to constrain Chariklo's size and shape, and the ring reflectivity. We consider four possible models for Ch…
Early formation of planetary building blocks inferred from Pb isotopic ages of chondrules
Jean Bollard, James N. Connelly, Martin J. Whitehouse +6
The most abundant components of primitive meteorites (chondrites) are millimeter-sized glassy spherical chondrules formed by transient melting events in the solar protoplanetary di…
Scientific rationale for Uranus and Neptune in situ explorations
O. Mousis, D. H. Atkinson, T. Cavalié +53
The ice giants Uranus and Neptune are the least understood class of planets in our solar system but the most frequently observed type of exoplanets. Presumed to have a small rocky…