Magnetohydrodynamical Torsional Oscillations from Thermoresistive Instability in Hot Jupiters

• Published in: The Astrophysical journal Vol. 959; no. 1; pp. 41 - 50
• Main Authors: Hardy, Raphaël, Charbonneau, Paul, Cumming, Andrew
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 01.12.2023; IOP Publishing
• Subjects: Astrophysical fluid dynamics; Astrophysics; Atmospheric dynamics; Atmospheric models; Atmospheric temperature; Electrical conductivity; Electrical resistivity; Equatorial regions; Exoplanet atmospheric dynamics; Exoplanet atmospheric variability; Extrasolar planets; Field strength; Fluid flow; Gas giant planets; Instability; Jupiter; Magnetic fields; Magnetohydrodynamics; Modelling; One dimensional models; Reynolds number; Stability; Temperature; Temperature dependence; Torsional oscillations

Hot Jupiter atmospheres may be subject to a thermoresistive instability where an increase in the electrical conductivity due to ohmic heating results in runaway of the atmospheric temperature. We introduce a simplified one-dimensional model of the equatorial substellar region of a hot Jupiter that i...