Greifswald 2024 – scientific programme
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P: Fachverband Plasmaphysik
P 4: Astrophysical Plasmas/Laser Plasmas
P 4.1: Invited Talk
Monday, February 26, 2024, 14:00–14:30, WW 1: HS
Ab initio calculations of conductivities under planetary interior conditions — •Martin Preising1, Martin French1, Maximilian Schörner1, Mandy Bethkenhagen2, Argha Roy1, Uwe Kleinschmidt1, and Ronald Redmer1 — 1Universität Rostock, Rostock, Germany — 2École Polytechnique, Palaiseau, France
We summarize our recent efforts to calculate thermal and electrical conductivities under planetary interior conditions with ab initio simulations.
We applied our method to state-of-the-art models [Mankovich and Fortney, Astrophys. J., 889, 51 (2020)] for the gas giant planets Jupiter [French et al., Astrophys. J. Suppl. Ser., 202, 5 (2012)] and Saturn [Preising et al., Astrophys. J. Suppl. Ser., 269, 47 (2023)]. We found a profound impact of the proposed helium-rich layer above Saturn's core on thermal and DC conductivity profiles. The results will affect future magnetohydrodynamic simulations for Saturn's magnetic field.
The ice giant planets Uranus and Neptune are not too well constrained by observational data. We consider different mixtures of hydrogen and methane. Our results show a steady increase in DC conductivity along Uranus' P-T path [Roy et al., submitted (2024)].
A recent study of fcc and hcp iron over a P-T range covering Earth's core-mantle boundary and inner core boundary resulted in fit formulas for the DC and thermal conductivity [Kleinschmidt et al., Phys. Rev. B, 107, 085145 (2023)], applicable to all rocky planets with an iron core.
Keywords: Ab initio simulations; Planetary Physics; Gas Giant Planets; Ice Giant Planets; Rocky Planets