Jean‐Baptiste Vincent
A5071865658- Astro and Planetary Science
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Stellar, planetary, and galactic studies
- Geology and Paleoclimatology Research
- Space Exploration and Technology
- Astronomical and nuclear sciences
- Historical Studies and Socio-cultural Analysis
- Nuclear Physics and Applications
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Radioactive contamination and transfer
- Space Satellite Systems and Control
- Medieval Architecture and Archaeology
- Atmospheric Ozone and Climate
- Diverse Cultural and Historical Studies
- Radioactive Decay and Measurement Techniques
- Spacecraft and Cryogenic Technologies
- Medieval European History and Architecture
- Archaeology and ancient environmental studies
- Astronomical Observations and Instrumentation
- Maritime and Coastal Archaeology
- Geomagnetism and Paleomagnetism Studies
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2017-2024
Planet
2017-2024
Université de Caen Normandie
2017-2024
Dienstleistungszentrum Ländlicher Raum
2024
Planetary Science Institute
2023
Institute of Archeology
2020-2022
Centre Michel de Boüard
2012-2022
University of Alicante
2022
Institut für Lungenforschung
2017-2018
Normandie Université
2018
Critical measurements for understanding accretion and the dust/gas ratio in solar nebula, where planets were forming 4.5 billion years ago, are being obtained by GIADA (Grain Impact Analyser Dust Accumulator) experiment on European Space Agency's Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko. Between 3.6 3.4 astronomical units inbound, OSIRIS (Optical, Spectroscopic, Infrared Remote Imaging System) detected 35 outflowing grains of mass 10(-10) to 10(-7) kilograms, 48 10(-5)...
Images of comet 67P/Churyumov-Gerasimenko acquired by the OSIRIS (Optical, Spectroscopic and Infrared Remote Imaging System) imaging system onboard European Space Agency’s Rosetta spacecraft at scales better than 0.8 meter per pixel show a wide variety different structures textures. The data importance airfall, surface dust transport, mass wasting, insolation weathering for cometary evolution, they offer some support subsurface fluidization models loss through ejection large chunks material.
A New Dawn Since 17 July 2011, NASA's spacecraft has been orbiting the asteroid Vesta—the second most massive and third largest in solar system (see cover). Russell et al. (p. 684 ) use Dawn's observations to confirm that Vesta is a small differentiated planetary body with an inner core, represents surviving proto-planet from earliest epoch of formation; also confirmed as source howardite-eucrite-diogenite (HED) meteorites. Jaumann 687 report on asteroid's overall geometry topography, based...
We analyzed more than 200 OSIRIS NAC images with a pixel scale of 0.9−2.4 m/pixel comet 67P/Churyumov-Gerasimenko (67P) that have been acquired from onboard the Rosetta spacecraft in August and September 2014 using stereo-photogrammetric methods (SPG). derived improved position pointing data for high-resolution shape model consists about 16 million facets (2 m horizontal sampling) typical vertical accuracy at decimeter scale. From this model, we derive volume northern hemisphere 9.35 km3 ±...
Context. The complex shape of comet 67P and its oblique rotation axis cause pronounced seasonal effects. Irradiation hence activity vary strongly.
Context. We investigate the formation and evolution of comet nuclei other trans-Neptunian objects (TNOs) in solar nebula primordial disk prior to giant planet orbit instability foreseen by Nice model.
ABSTRACT The Rosetta probe, orbiting Jupiter-family comet 67P/Churyumov–Gerasimenko, has been detecting individual dust particles of mass larger than 10 −10 kg by means the GIADA collector and OSIRIS Wide Angle Camera Narrow since 2014 August will continue until 2016 September. Detections single allow us to estimate anisotropic flux from 67P, infer loss rate size distribution at surface sunlit nucleus, see whether 67P evolves in time. velocity orbiter, relative is much lower measured GIADA,...
Abstract Hera is a planetary defense mission under development in the Space Safety and Security Program of European Agency for launch 2024 October. It will rendezvous late 2026 December with binary asteroid (65803) Didymos particular its moon, Dimorphos, which be impacted by NASA’s DART spacecraft on 2022 September 26 as first deflection test. The main goals are detailed characterization physical properties Dimorphos crater made mission, well measurement momentum transfer efficiency...
Abstract The NASA Double Asteroid Redirection Test (DART) mission performed a kinetic impact on asteroid Dimorphos, the satellite of binary (65803) Didymos, at 23:14 UTC 26 September 2022 as planetary defence test 1 . DART was first hypervelocity experiment an size and velocity scales relevant to defence, intended validate means deflection. Here we report determination momentum transferred by impact. On basis change in orbit period 2 , find instantaneous reduction Dimorphos’s along-track...
Some active asteroids have been proposed to be formed as a result of impact events1. Because are generally discovered by chance only after their tails fully formed, the process how ejecta evolve into tail has, our knowledge, not directly observed. The Double Asteroid Redirection Test (DART) mission NASA2, in addition having successfully changed orbital period Dimorphos3, demonstrated activation an asteroid resulting from under precisely known conditions. Here we report observations DART with...
Abstract Images collected during NASA’s Double Asteroid Redirection Test (DART) mission provide the first resolved views of Didymos binary asteroid system. These images reveal that primary asteroid, Didymos, is flattened and has plausible undulations along its equatorial perimeter. At high elevations, surface rough contains large boulders craters; at low elevations smooth possesses fewer craters. Didymos’ moon, Dimorphos, an intimate mixture boulders, several asteroid-wide lineaments, a...
A spacecraft flyby of an asteroid reveals a high-density body that is more like planetesimal than rubble pile.
Aims. The OSIRIS camera onboard the Rosetta spacecraft has been acquiring images of comet 67P/Churyumov-Gerasimenko (67P)'s nucleus at spatial resolutions down to ~0.17 m/px ever since Aug. 2014. These have yielded unprecedented insight into morphological diversity comet's surface. This paper presents an overview regional morphology 67P.
Context. The Rosetta mission of the European Space Agency has been orbiting comet 67P/Churyumov-Gerasimenko (67P) since August 2014 and is now in its escort phase. A large complement scientific experiments designed to complete most detailed study a ever attempted are onboard Rosetta.
We study the link between gravitational slopes and surface morphology on nucleus of comet 67P/Churyumov-Gerasimenko provide constraints mechanical properties cometary material. computed for five regions that are representative different morphologies observed surface, using two shape models from OSIRIS images by stereo-photoclinometry (SPC) stereo-photogrammetry (SPG) techniques. estimated tensile, shear, compressive strengths considerations. The show a similar general pattern in terms...
During its 2 yr mission around comet 67P/Churyumov–Gerasimenko, ESA's Rosetta spacecraft had the unique opportunity to follow closely a in most active part of orbit. Many studies have presented typical features associated with activity nucleus, such as localized dust and gas jets. Here, we report on series more energetic transient events observed during 3 months surrounding comet's perihelion passage 2015 August. We detected characterized 34 outbursts cameras, one every 2.4 nucleus...
Dust jets, i.e. fuzzy collimated streams of cometary material arising from the nucleus, have been observed in-situ on all comets since Giotto mission flew by comet 1P/Halley in 1986. Yet their formation mechanism remains unknown. Several solutions proposed, localized physical mechanisms surface/sub-surface (see review Belton (2010)) to purely dynamical processes involving focusing gas flows local topography (Crifo et al. 2002). While latter seems be responsible for larger features, high...
We collect observational evidence that supports the scheme of mass transfer on nucleus comet 67P/Churyumov-Gerasimenko. The obliquity rotation axis 67P causes strong seasonal variations. During perihelion southern hemisphere is four times more active than north. Northern territories are widely covered by granular material indicates back fall originating from south. Decimetre sized chunks contain water ice and their trajectories influenced an anti-solar force instigated sublimation. OSIRIS...