Spin-down by dynamo action in simulated radiative stellar layers

Autor: Ludovic Petitdemange, Florence Marcotte, Christophe Gissinger

Publikováno v: Science
Science, 2023, 379 (6629), pp.300-303. ⟨10.1126/science.abk2169⟩

International audience; 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 transporting angular momentum and chemical elemen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed5916464f8642b79385b4a3c31492bd
https://doi.org/10.1126/science.abk2169

Enhanced dynamo growth in nonhomogeneous conducting fluids

Autor: Florence Marcotte, Basile Gallet, Christophe Gissinger, François Pétrélis

Publikováno v: Physical Review E
Physical Review E, 2021, ⟨10.1103/PhysRevE.104.015110⟩

We address magnetic-field generation by dynamo action in systems with inhomogeneous electrical conductivity and magnetic permeability. More specifically, we first show that the Taylor-Couette kinematic dynamo undergoes a drastic reduction of its stab

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea9a5c1f9b99defec188a5722d5a9cb4
http://arxiv.org/abs/2112.11390

A magnetically driven equatorial jet in Europa’s ocean

Autor: Ludovic Petitdemange, Christophe Gissinger

Publikováno v: Nature Astronomy
Nature Astronomy, Nature Publishing Group, In press, 3 (5), pp.401-407. ⟨10.1038/s41550-019-0713-3⟩

During recent decades, data from space missions have provided strong evidence of deep liquid oceans underneath a thin outer icy crust on several moons of Jupiter, particularly Europa. But these observations have also raised many unanswered questions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c1d78cb2a320474a5aa2d48deb4f8cf
https://doi.org/10.1038/s41550-019-0713-3

Capillary wave turbulence experiments in microgravity

Autor: Christophe Gissinger, Stéphan Fauve, Michael Berhanu, Eric Falcon, Guillaume Michel

Publikováno v: EPL-Europhysics Letters
EPL-Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2019, 128 (3), pp.34001. ⟨10.1209/0295-5075/128/34001⟩

International audience; Using the FLUIDICS (Fluid Dynamics in Space) experiment in the International Space Station, turbulence of capillary waves at the air-water interface is experimentally investigated in weightlessness. Capillary waves are excited

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6355c64ab3cab2cd9b9a607d72862ca3
https://hal.archives-ouvertes.fr/hal-02431780/file/Berhanuetal_EPL-rev4.pdf

Magnetohydrodynamics of stably stratified regions in planets and stars

Autor: Christophe Gissinger, Ludovic Petitdemange, J. Philidet, François Lignières

Publikováno v: Geophysical and Astrophysical Fluid Dynamics
Geophysical and Astrophysical Fluid Dynamics, In press, pp.1-20. ⟨10.1080/03091929.2019.1670827⟩
Geophysical and Astrophysical Fluid Dynamics, Taylor & Francis, In press, pp.1-20. ⟨10.1080/03091929.2019.1670827⟩

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 field seem to indicate the presence of a thin, stably stratified layer at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff15275c769762733a8539b8cc601c94
https://hal.sorbonne-universite.fr/hal-02344508