8 papers
Titanium Oxide Absorption as a Proxy to Detect Long term Variation and Activity Cycle in Proxima Centauri
Fatemeh Azizi, Mohammad Taghi Mirtorabi, Rahimeh Foroughi
Stellar activity cycles on magnetically active stars can be estimated by molecular absorption bands. We have previously introduced a molecular index which compares absorptional lin…
A New Scaling Law for Non-Dipolar Magnetic Fields in Rapidly Rotating Stars and Planets
Paula N. Wulff, Hao Cao, Jonathan M. Aurnou
Magnetic field generation in giant planets and rapidly rotating stars produces a diverse range of field geometries, from large-scale dipole-dominated configurations to complex, sma…
The Effects of Radially Varying Diffusivities on Stellar Convection Zone Dynamics
Brandon J. Lazard, Nicholas A. Featherstone, Jonathan M. Aurnou
Convection is ubiquitous in stellar and planetary interiors where it likely plays an integral role in the generation of magnetic fields. As the interiors of these objects remain hi…
From Geostrophic to Magnetically-Damped Turbulence in Liquid Metal Rotating Magnetoconvection
Tao Liu, Yufan Xu, Jewel A. Abbate +2
Understanding planetary core convection dynamics requires the study of convective flows in which the Coriolis and Lorentz forces attain a leading-order, so-called magnetostrophic b…
On the meaning of the dynamo radius in giant planets with stable layers
Paula N. Wulff, Hao Cao, Jonathan M. Aurnou
Current structure models of Jupiter and Saturn suggest that helium becomes immiscible in hydrogen in the outer part of the planets' electrically conducting regions. This likely lea…
Diffusivity-Free Turbulence in Liquid Metal Rotating Rayleigh-Bénard Convection Experiments
Jewel A. Abbate, Yufan Xu, Tobias Vogt +3
Convection in planets and stars is predicted to occur in the "ultimate regime'' of diffusivity-free, rapidly rotating turbulence, in which flows are characteristically unaffected b…