3 papers
astro-ph.GA2025
A visual approach to global accretion disk instabilities
Nicolas Brughmans, Rony Keppens
For over 30 years, the Magneto-Rotational Instability has been accepted as the mechanism driving accretion disk turbulence. Its physical basis is well understood, where an interpla…
astro-ph.SR2025
The hydrodynamic thermal continuum, with applications to stratified atmospheres and 1D coronal loop models
Rony Keppens, Jordi De Jonghe, Adrian Kelly +2
Using both analytical and numerical means, we demonstrate that linear stability analysis of a hydrodynamic stratified atmosphere or a 1D coronal loop model in non-adiabatic setting…
astro-ph.HE2024
Parametric Survey of Nonaxisymmetric Accretion Disk Instabilities: Magnetorotational Instability to Super-Alfvénic Rotational Instability
Nicolas Brughmans, Rony Keppens, Hans Goedbloed
Accretion disks are highly unstable to magnetic instabilities driven by shear flow, where classically, the axisymmetric, weak-field Magneto-Rotational Instability (MRI) has receive…