Publications (16)
A new ab initio equation of state of hcp-Fe and its implication on the interior structure and mass-radius relations of rocky super-Earths
Kaustubh Hakim, Attilio Rivolidini, Tim Van Hoolst +4
More than a third of all exoplanets can be classified as super-Earths based on radius (1-2 ) and mass (< 10 ). Here we model mass-radius relations bas…
Librations and Obliquity of Mercury from the BepiColombo radio-science and camera experiments
Gregor Pfyffer, Tim Van Hoolst, Véronique Dehant
A major goal of the BepiColombo mission to Mercury is the determination of the structure and state of Mercury's interior. Here the BepiColombo rotation experiment has been simulate…
Titan's Obliquity as evidence for a subsurface ocean?
Rose-Marie Baland, Tim Van Hoolst, Marie Yseboodt +1
On the basis of gravity and radar observations with the Cassini spacecraft, the moment of inertia of Titan and the orientation of Titan's rotation axis have been estimated in recen…
Non-linear Three-mode Coupling of Gravity Modes in Rotating Slowly Pulsating B Stars: Stationary Solutions and Modeling Potential
Jordan Van Beeck, Tim Van Hoolst, Conny Aerts +1
Context. Slowly pulsating B (SPB) stars display multi-periodic variability in the gravito-inertial mode regime with indications of non-linear resonances between modes. Several have…
Modelling of thermal stratification at the top of a planetary core: Application to the cores of Earth and Mercury and the thermal coupling with their mantles
Jurrien Sebastiaan Knibbe, Tim Van Hoolst
We present a new numerical scheme for one-dimensional conduction problems of a spherical shell. The scheme adopts a solution of the conduction equation in each interval of the chos…
The radioscience LaRa instrument onboard ExoMars 2020 to investigate the rotation and interior of Mars
Veronique Dehant, Sebastien Le Maistre, Rose-Marie Baland +20
LaRa (Lander Radioscience) is an experiment on the ExoMars 2020 mission that uses the Doppler shift on the radio link due to the motion of the ExoMars platform tied to the surface…
Geoscience for understanding habitability in the solar system and beyond
Veronique Dehant, Vinciane Debaille, Vera Dobos +15
This paper reviews habitability conditions for a terrestrial planet from the point of view of geosciences. It addresses how interactions between the interior of a planet or a moon…
LaRa after RISE: Expected improvement in the Mars rotation and interior models
Marie-Julie Péters, Sébastien Le Maistre, Marie Yseboodt +4
Two years after InSight's arrival at Mars, the ExoMars 2020 mission will land on the opposite side of the red planet. Similarly to InSight, which carries the RISE (Rotation and Int…
Obliquity of Mercury: influence of the precession of the pericenter and of tides
Rose-Marie Baland, Marie Yseboodt, Attilio Rivoldini +1
Mercury is expected to deviate from the classical Cassini state since this state is defined for a uniformly precessing rigid planet. We develop an extended Cassini state model that…
The obliquity of Enceladus
Rose-Marie Baland, Marie Yseboodt, Tim Van Hoolst
The extraordinary activity at Enceladus' warm south pole indicates the presence of an internal global or local reservoir of liquid water beneath the surface. While Tyler (2009, 201…
Detection of nonlinear resonances among gravity modes of slowly pulsating B stars: results from five iterative prewhitening strategies
Jordan Van Beeck, Dominic M. Bowman, May G. Pedersen +3
Context. Slowly pulsating B (SPB) stars are main-sequence multi-periodic oscillators that display non-radial gravity modes. For a fraction of these pulsators, 4-year photometric li…
The influence of a stably stratified layer on the hydromagnetic waves in the Earth's core and their electromagnetic torques
Fleur Seuren, Santiago A. Triana, Jérémy Rekier +2
Evidence from seismic studies, mineral physics, thermal evolution models and geomagnetic observations is inconclusive about the presence of a stably stratified layer at the top of…
Influence of an inner core on the long-period forced librations of Mercury
Marie Yseboodt, Attilio Rivoldini, Tim Van Hoolst +1
The planetary perturbations on Mercury's orbit lead to long-period forced librations of Mercury's mantle. These librations have previously been studied for a planet with two layers…
Mercury's crustal thickness correlates with lateral variations in mantle melt production
Mikael Beuthe, Bernard Charlier, Olivier Namur +2
Mercury's crust has a complex structure resulting from a billion years of volcanism. The surface variations in chemical composition have been identified from orbit by the spacecraf…
Effects of the librationally induced flow in Mercury's fluid core with an outer stably stratified layer
Fleur Seuren, Santiago A. Triana, Jérémy Rekier +2
Observational constraints on Mercury's thermal evolution and magnetic field indicate that the top part of the fluid core is stably stratified. Here we compute how a stable layer af…
Librations and obliquity of the largest moons of Uranus
Rose-Marie Baland, Valerio Filice, Sébastien Le Maistre +3
Following the discovery of several ocean worlds in the solar system, and the selection of Uranus as the highest priority objective by the Planetary Science and Astrobiology Decadal…