3D Numerical Model of the Envelope of a Hot Exoplanet Based on Spherical Coordinates

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Abstract

A new 3D parallel numerical code in spherical coordinates has been developed to study the stellar wind flow around hot Jupiter. The peculiarity of the spherical coordinate system in the vicinity of the poles is overcome by using a ternary spherical grid, which is a composite grid consisting of three separate sectors. The numerical model of multicomponent magnetohydrodynamics, developed earlier for Cartesian coordinates, has been transferred to the new model. The results of a numerical calculation of the structure of an extended envelope of a quasi-open type for the case of a super-Alfvenian flow around a hot Jupiter are presented. We showed that the spatial resolution of the grid is sufficient for a self-consistent calculation of the structure of the atmosphere of a hot Jupiter. This allows further use of the new model for 3D aeronomic calculations.

About the authors

A. G. Zhilkin

Institute of Astronomy, Russian Academy of Sciences

Author for correspondence.
Email: zhilkin@inasan.ru
119017, Moscow, Russia

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Copyright (c) 2023 А.Г. Жилкин

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