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P: Fachverband Plasmaphysik
P 3: Astrophysical Plasmas
P 3.2: Vortrag
Montag, 20. März 2023, 16:45–17:00, CHE/0089
Ionization and transport in partially ionized multicomponent plasmas: Atmospheres of hot Jupiters — Sandeep Kumar1,2, Anna Julia Poser1, Manuel Schöttler1, Uwe Kleinschmidt1, Wieland Dietrich3, Johannes Wicht3, Martin French1, and •Ronald Redmer1 — 1Universität Rostock, Institut für Physik, D-18051 Rostock — 2CASUS, D-02826 Görlitz — 3MPI for Solar System Research, D-37077 Göttingen
We study ionization and transport processes in partially ionized multicomponent plasmas [1]. The plasma composition is calculated via a system of coupled mass-action laws. The electronic transport properties are determined by the electron-ion and electron-neutral transport cross sections. The electrical and thermal conductivities as well as the Lorenz number are calculated. For the thermal conductivity, we consider also the contributions of the translational motion of neutral particles and of the dissociation, ionization, and recombination reactions. We apply our approach to plasma conditions as typical for atmospheres of hot Jupiters such as HD 209458b. The electrical conductivity profile allows revising the Ohmic heating power related to the fierce winds in the planet's atmosphere in order to explain the observed inflation of HD 209458b. The model is also applied to study possible induction processes in the atmosphere of ultra-hot Jupiters like KELT-9b [2].
[1] S. Kumar et al., Phys. Rev. E 103, 063203 (2021)
[2] W. Dietrich et al., MNRAS 517, 3113 (2022)