A5041833883- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Geomagnetism and Paleomagnetism Studies
- Geophysics and Gravity Measurements
- Space Science and Extraterrestrial Life
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Space Exploration and Technology
- Space Satellite Systems and Control
- Spacecraft Design and Technology
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Historical Astronomy and Related Studies
- Distributed and Parallel Computing Systems
- Geology and Paleoclimatology Research
- Astrophysics and Star Formation Studies
- History and Developments in Astronomy
- Cinema and Media Studies
- Spacecraft Dynamics and Control
- Digital Games and Media
- Space exploration and regulation
Observatoire de Paris
2012-2024
Institut de Mécanique Céleste et de Calcul des Éphémérides
2014-2024
Sorbonne Université
2014-2024
Centre National de la Recherche Scientifique
2015-2024
Université de Lille
2014-2024
Université Paris Sciences et Lettres
2016-2024
Roche (France)
2006-2024
Laboratoire de Tribologie et Dynamique des Systèmes
2005-2022
Physiologie Environnement et Génétique pour l'Animal et les Systèmes d'Elevage
2015-2022
Délégation Paris 6
2022
Abstract The JUpiter ICy moons Explorer (JUICE) of ESA was launched on 14 April 2023 and will arrive at Jupiter its in July 2031. In this review article, we describe how JUICE investigate the interior three icy Galilean moons, Ganymede, Callisto Europa, during orbital tour final phase around Ganymede. Detailed geophysical observations about can only be performed from close distances to best estimates signatures interior, such as an induced magnetic field, tides rotation variations, radar...
Tidal interactions between Saturn and its satellites play a crucial role in both the orbital migration of heating their interiors. Therefore, constraining tidal dissipation (here ratio k2/Q) opens door to past evolution whole system. If Saturn's can be determined at different frequencies, it may also possible constrain giant planet's interior structure, which is still uncertain. Here, we try determine through current effect on orbits main moons, using astrometric data spanning more than...
Any model of tides is based on a specific hypothesis how lagging depends the tidal-flexure frequency. For example, Gerstenkorn (1955), MacDonald (1964), and Kaula (1964) assumed constancy geometric lag angle, while Singer (1968) Mignard (1979, 1980) asserted time lag. Thus, each these two models was certain law scaling The actual dependence frequency more complicated determined by rheology planet. Besides, particular functional form this will unambiguously fix appropriate tidal quality...
Context . Jupiter and its moons form a complex dynamical system that includes several coupling dynamics at different frequencies. In particular the Laplace resonance is fundamental to maintaining energy dissipation sustain Io’s volcanic activity Europa’s subsurface ocean; studying stability thus crucial for characterizing potential habitability of these moons. The origin evolution driven by strong tidal interactions between Galilean moons, future planetary exploration missions JUICE Europa...
We present new ephemerides of Phobos and Deimos that are fit to observations from 1877 2005 include recent spacecraft by Mars Global Surveyor Express. In contrast earlier models, this is the first completely numerical one. particular, tidal effects have been modeled bulge raised each moon on planet, instead fitting secular accelerations in satellite longitudes. This partly avoids absorbing observational errors its related acceleration. Moreover, applying model other systems will be easier....
We study the tidal history of an icy moon, basing our approach on a dissipation model, which combines viscoelasticity with anelasticity and takes into account microphysics attenuation. apply this to Iapetus, most remote large moon in Saturnian system. Different authors provide very different estimates for Iapetus's despinning timescale, by several orders magnitude. One reason these differences is choice model used computing spin evolution. As laboratory data viscoelastic properties planetary...
Earth-like planets have viscoelastic mantles, whereas giant may cores. The tidal dissipation of such solid regions, gravitationally perturbed by a companion body, highly depends on their rheology and the frequency. Therefore, modelling interactions presents high interest to provide constraints planets' properties understand history evolution, in our Solar System or exoplanetary systems. We examine equilibrium tide anelastic parts planet whatever rheology, taking into account presence fluid...
Like our Moon, the majority of solar system's satellites are locked in a 1:1 spin-orbit resonance; on average, these show same face toward planet at constant rotation rate equal to satellite's orbital rate. In addition uniform rotational motion, physical librations (oscillations about an equilibrium) also occur. The may contain signatures internal properties. Using stereophotogrammetry Cassini Image Science Subsystem (ISS) images, we measured longitudinal forced Saturn's moon Mimas. Our...
In the coming decade, JUICE and Europa Clipper radio-science will yield most accurate estimation to date of Galilean moons' physical parameters ephemerides. JUICE's PRIDE (Planetary Radio Interferometry Doppler Experiment) help achieve such a solution by providing VLBI (Very Long Baseline Interferometry) observations spacecraft's lateral position, complementing nominal measurements. this paper, we quantify how can contribute ephemerides determination, in terms attainable improvement...
We present a new theory of the four Galilean satellites Io, Europa, Ganymede and Callisto. This aims to deliver highly accurate ephemerides able represent satellites' motion over several centuries. It is based on numerical integration elaborated equations motion. first paper describes tests many usually neglected perturbations. are then retain some them in dynamical model for system. A method developed adjust observations given. used general formalism so it can be extended systems other than...
Tidal dissipation, which is directly linked to internal structure, one of the key physical mechanisms that drive systems evolution and govern their architecture. A robust evaluation its amplitude thus needed predict time for spins orbits final states. The purpose this paper refine recent model anelastic tidal dissipation in central dense region giant planets, commonly assumed retain a large amount heavy elements, constitute an important source dissipation. previous evaluated impact presence...