Publications (16)
Impacts of stellar evolution and dynamics on the habitable zone: The role of rotation and magnetic activity
Florian Gallet, Corinne Charbonnel, Louis Amard +3
In this article, we aim to provide the community with the dependence of the habitable zone upon the stellar mass, metallicity, rotation, and for various prescriptions of the limits…
Accretion of Saturn's mid-sized moons during the viscous spreading of young massive rings: solving the paradox of silicate-poor rings versus silicate-rich moons
Sébastien Charnoz, Aurélien Crida, Julie C. Castillo-Rogez +7
The origin of Saturn's inner mid-sized moons (Mimas, Enceladus, Tethys, Dione and Rhea) and Saturn's rings is debated. Charnoz et al. (2010) introduced the idea that the smallest i…
The long term dynamics of the solar radiative zone associated to new results from SoHO and young solar analogs
Sylvaine Turck-Chieze, Sebastien Couvidat, Antonio Eff-Darwich +6
The Standard Solar Model (SSM) is no more sufficient to interpret all the observations of the radiative zone obtained with the SoHO satellite. We recall our present knowledge of th…
Tidal dynamics of extended bodies in planetary systems and multiple stars
Stephane Mathis, Christophe Le Poncin-Lafitte
With the discovery during the past decade of a large number of extrasolar planets orbiting their parent stars at a distance lower than 0.1 astronomical unit (and the launch and the…
The coupling between internal waves and shear-induced turbulence in stellar radiation zones: the critical layer
Lucie Alvan, Stephane Mathis, Thibaut Decressin
Internal gravity waves (hereafter IGWs) are known as one of the candidates for explaining the angular velocity profile in the Sun and in solar-type main-sequence and evolved stars,…
Is it necessary to go beyond the ponctual mass approximation for tidal perturber in close systems?
Stephane Mathis, Christophe Le Poncin-lafitte
With the discoveries of very close star-planet systems with planet orbiting sometimes at several star radius but also with well-known situations in our solar system where natural s…
Angular Momentum Transport in Stellar Interiors
Conny Aerts, Stephane Mathis, Tamara Rogers
Stars lose a significant amount of angular momentum between birth and death, implying that efficient processes transporting it from the core to the surface are active. Space astero…
Spin alignment of stars in old open clusters
Enrico Corsaro, Yueh-Ning Lee, Rafael A. GarcÃa +6
Stellar clusters form by gravitational collapse of turbulent molecular clouds, with up to several thousand stars per cluster. They are thought to be the birthplace of most stars an…
Sub-Inertial Gravity Modes in the B8V Star KIC 7760680 Reveal Moderate Core Overshooting and Low Vertical Diffusive Mixing
Ehsan Moravveji, Richard H. D. Townsend, Conny Aerts +1
KIC 7760680 is so far the richest slowly pulsating B star, by exhibiting 36 consecutive dipole () gravity (g-) modes. The monotonically decreasing period spacing of the ser…
A Hot Saturn Orbiting An Oscillating Late Subgiant Discovered by TESS
Daniel Huber, William J. Chaplin, Ashley Chontos +139
We present the discovery of TOI-197.01, the first transiting planet identified by the Transiting Exoplanet Survey Satellite (TESS) for which asteroseismology of the host star is po…
On the Stability of a General Magnetic Field Topology in Stellar Radiative Zones
Kyle Augustson, Stephane Mathis, Antoine Strugarek
This paper provides a brief overview of the formation of stellar fossil magnetic fields and what potential instabilities may occur given certain configurations of the magnetic fiel…
Linking the Interiors and Surfaces of Magnetic Stars
Jim Fuller, Stephane Mathis
Strong magnetic fields are observed in a substantial fraction of upper main sequence stars and white dwarfs. Many such stars are observed to exhibit photometric modulations as the…
Asteroseismology with the Roman Galactic Bulge Time-Domain Survey
Daniel Huber, Marc Pinsonneault, Paul Beck +24
Asteroseismology has transformed stellar astrophysics. Red giant asteroseismology is a prime example, with oscillation periods and amplitudes that are readily detectable with time-…
Tidal Dissipation in Giant Planets
Jim Fuller, Tristan Guillot, Stephane Mathis +1
Tidal interactions between moons and planets can have major effects on the orbits, spins, and thermal evolution of the moons. In the Saturn system, tidal dissipation in the planet…
A 20-Second Cadence View of Solar-Type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Re-characterization of pi Men c
Daniel Huber, Timothy R. White, Travis S. Metcalfe +50
We present an analysis of the first 20-second cadence light curves obtained by the TESS space telescope during its extended mission. We find a precision improvement of 20-second da…
Pulsation-driven mean zonal and meridional flows in rotating massive stars
Umin Lee, Stephane Mathis, Coralie Neiner
Zonal and meridional axisymmetric flows can deeply impact the rotational and chemical evolution of stars. Therefore, momentum exchanges between waves propagating in stars, differen…