Thank you. It's a great question. While I cannot answer definitively, I would speculate that this phenomena is related, but not the same as a CME. In our sun, CMEs are basically created by magnetic perturbances in the atmosphere created by the sun itself. In the case of V Hya, these perturbances are created by the influence of the companion stars. Also, because V Hya is post main sequence and in a later stage of evolution, its atmosphere is different so I don't think the "coronal" part would be the same. However, after a cursory look back at the article, I couldn't find which exact part of the atmosphere is the source.