Influence of the coronal mass ejections on the dynamics of the atmosphere of hot-Jupiter HD 209458b

Hot-Jupiters atmospheres are affected by the coronal plasma ejections of their parent stars. Photometric observations in the ultraviolet range, with the support of numerical hydrodynamic models, confirmed that their proximity to the parent stars leads to the formation of an expanded envelope, part of which located outside the Roche lobe. We present the simulation of the interaction of the quasiclosed envelope of a typical hot-Jupiter HD 209458b with the characteristic CMEs observed for the Sun. Abrupt changes of dynamic pressure of the stellar wind during the passage of the CME tear off part of the gas envelope, leading to the strong short-term growth of the mass loss rate. Taking into account the CME frequency of solar-like star, it was found that the mass loss of the atmosphere due to the effects of CMEs is comparable to the mass loss during a stationary wind.