Speaker
Dr
Antonio Maggio
Description
X-ray and UV irradiation from stellar hosts is an important ingredient for modeling photochemistry and photoevaporation processes in exoplanetary atmospheres.
In the framework of the Italian Ariel Dry-Run esperiment, we have characterized the high-energy emission of the stellar hosts in 8 selected exoplanetary systems.
We will present the results of this study, including predictions of the X-ray flux based on classical proxies of stellar magnetic activity, and predictions of X-ray and EUV irradiation based on synthetic XUV spectra.
For a few cases, we were able also to perform comparison with actual measurements based on XMM-Newton and HST high-resolution X-ray and FUV spectra.