Gas dynamic modeling of the CME propagation through the envelope of a hot Jupiter-type exoplanet

10th International Conference on Numerical Modeling of Space Plasma Flows: ASTRONUM-2015

Cherenkov, A.A.^1 ; Kaygorodov, P.V.^1 ; Bisikalo, D.V.^1

Institute of Astronomy, Russian Academy of Sciences, 48 Pyatnitskaya St., Moscow

119017, Russia^1

关键词: Bow shocks;    Coronal mass ejection;    Entropy fix;    Nonstationary;    Numerical scheme;    Orbital motions;    Quasi-stationary;    Stellar wind;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/719/1/012010/pdf
DOI  :  10.1088/1742-6596/719/1/012010

来源: IOP

【 摘 要 】

We propose a 3D gasdynamic numerical model for the study of the interaction between the extended envelopes of hot Jupiters, overfilling their Roche lobes, and non-stationary stellar wind. In the model we use a Roe-Osher numerical scheme with Eindfeldt entropy fix. To test the model we have simulated a flow structure, forming due to the interaction between the extended quasi-stationary envelope of the hot Jupiter planet HD 209458b and the bow shock formed ahead of a propagating coronal mass ejection (CME). We have adopted the solar CME parameters in our computations and taken into account the fact that the planet is located close to its host star. The simulation results show that the bow shock of the CME partially destroys the stream, starting from the Li point of the quasi-closed planet's envelope. A bow shock, existing ahead of the planet in its orbital motion when the stellar wind is undisturbed, almost disappears when the CME shock passes through the system.