129 citations · 518 across the 27 of their papers we have counts for
15 papers · 1 filter
Probing magnetic fields in stars: A 2D oscillation framework including rotation and magnetism
Antoine Fort, Rhita-Maria Ouazzani, Lucas Barrault +2
Understanding the role of internal magnetic fields in stars remains a major challenge for the description of angular momentum transport and stellar evolution. It is therefore essen…
Magnetic field measurements in a sample of Class I and flat-spectrum protostars observed with SPIRou
L. Drouglazet, E. Alecian, A. Sousa +27
Magnetic fields play a crucial role throughout stellar evolution, regulating angular momentum, channelling accretion, and launching jets and outflows. While the magnetic properties…
Nonlinear interaction between dynamo-generated magnetic fields, mean flows and internal gravity waves in stellar stably-stratified layers: From 3D to 1D
Florentin Daniel, Ludovic Petitdemange, Charly Pinçon +3
Magnetic fields have been constrained at the surface of several massive and intermediate-mass stars, but their origin and properties in deep stellar radiative interiors are still d…
The Future of Solar modelling: requirements for a new generation of solar models
Gael Buldgen, Gloria. Canocchi, Arthur. Le Saux +22
Helioseismology and solar modelling have enjoyed a golden era thanks to decades-long surveys from ground-based networks such as for example GONG, BiSON, IRIS and the SOHO and SDO s…
Magnetic field morphologies in convective zones influenced by a turbulent surface layer
Anna Guseva, Ludovic Petitdemange, Charly Pinçon
Spectropolarimetric observations show that many low-mass stars possess large-scale poloidal magnetic fields with considerable dipole component, which in some cases exhibit temporal…
Coriolis darkening in late-type stars II. Effect of self-sustained magnetic fields in stratified convective envelope
C. Pinçon, L. Petitdemange, R. Raynaud +4
Modeling the surface brightness distribution of stars is of prime importance to interpret observations. Nevertheless, this remains quite challenging for cool stars as it requires o…
Tayler-Spruit dynamos in simulated radiative stellar layers
Ludovic Petitdemange, Florence Marcotte, Christophe Gissinger +1
The Tayler-Spruit dynamo mechanism has been proposed two decades ago as a plausible mechanism to transport angular momentum in radiative stellar layers. Direct numerical simulation…
Spin-down by dynamo action in simulated radiative stellar layers
Ludovic Petitdemange, Florence Marcotte, Christophe Gissinger
The evolution of a star is influenced by its internal rotation dynamics through transport and mixing mechanisms, which are poorly understood. Magnetic fields can play a role in tra…
Magnetohydrodynamics of stably stratified regions in planets and stars
J. Philidet, C. Gissinger, F. Lignières +1
Stably stratified layers are present in stellar interiors (radiative zones) as well as planetary interiors - recent observations and theoretical studies of the Earth's magnetic fie…
Gravity darkening in late-type stars. The Coriolis effect
Raphaël Raynaud, Michel Rieutord, Ludovic Petitdemange +2
Recent interferometric data have been used to constrain the brightness distribution at the surface of nearby stars, in particular the so-called gravity darkening that makes fast ro…
Dipolar dynamos in stratified systems
R. Raynaud, L. Petitdemange, E. Dormy
Observations of low-mass stars reveal a variety of magnetic field topologies ranging from large-scale, axial dipoles to more complex magnetic fields. At the same time, three-dimens…
Influence of the mass distribution on the magnetic field topology
Raphaël Raynaud, Ludovic Petitdemange, Emmanuel Dormy
Context. Three-dimensional spherical dynamo simulations carried out within the framework of the anelastic approximation have revealed that the established distinction between dipol…
Mechanisms of Planetary and Stellar Dynamos
Emmanuel Dormy, Ludovic Petitdemange, Martin Schrinner
We review some of the recent progress on modeling planetary and stellar dynamos. Particular attention is given to the dynamo mechanisms and the resulting properties of the field. W…
Dipole Collapse and Dynamo Waves in Global Direct Numerical Simulations
Martin Schrinner, Ludovic Petitdemange, Emmanuel Dormy
Magnetic fields of low-mass stars and planets are thought to originate from self-excited dynamo action in their convective interiors. Observations reveal a variety of field topolog…
Oscillatory dynamos and their induction mechanisms
M. Schrinner, L. Petitdemange, E. Dormy
Context: Large-scale magnetic fields resulting from hydromagnetic dynamo action may differ substantially in their time dependence. Cyclic field variations, characteristic for the s…