{"references": ["Benatti, S. et al. (2019), A&A, 630, A81", "Benatti, S. et al. (2021), A&A, 650, A66", "Colombo, S. et al. (2022), A&A, 661, A148", "David, T.J. et al. (2019), ApJ, 885, L12", "Drake, J.J. et al. (2013), ApJ, 764, 170", "Flaccomio, E. et al. (2018), A&A, 620, A55", "Johnstone, C.P. et al. (2021), A&A, 649, A96", "King, G.W. et al. (2018), MNRAS, 478, 1193", "Kraus, A.L. et al. (2014), AJ, 147, 146", "Kubyshkina, D. et al. (2018), ApJ, 866, L18", "Locci, D. et al. (2019), A&A, 624, A101", "Locci, D. et al. (2022), PSJ, 3, 1", "Lopez, E.D. & Fortney, J.J. (2014), ApJ, 792, 1", "Maggio, A. et al. (2022), ApJ, 925, 172", "Newton, E.R. et al. (2019), ApJ, 880, L17", "Penz, T. et al. (2008), A&A, 477, 309", "Pillitteri, I. et al. (2022), A&A, 666, A198", "Sanz Forcada, J. et al. (2022), A&A, 666, A198", "Sanz Forcada, J. et al. (2023), Proceedings CS21, DOI 10.5281/zenodo.7561725", "Su\u00e1rez Mascare\u00f1o, A., Damasso, M. et al. (2022), NatAs, 6, 232"]}

Observations and modeling of stellar XUV emission in different evolutionary phases is fundamental to understand photochemistry and evaporation processes in exoplanetary atmospheres. As part of the on-going project THE StellaR PAth (Time-dependent High-Energy Radiation and Planetary Atmosphere interaction) we present initial results of our first two study cases of gaseous exoplanets irradiated by young solar-like stars, based on dedicated follow-up observations of the host stars with XMM-Newton and HST. The systems are orbiting the young stars V1298 Tau and DS Tuc A, for which we derived spectral properties of the high-energy emission during quiescent and flaring states. We discuss short-term and long-term effects of the XUV irradiation on the planetary atmospheres.

We acknowledge financial contribution from the ASI-INAF agreement n.2018-16-HH.0 (THE StellaR PAth project), and from the ARIEL ASI-INAF agreement n.2021-5-HH.0. We also acknowledge partial support by the projects HOT-ATMOS (PRIN INAF 2019) and PLATEA (ASI-INAF agreement n.2018-16-HH.0).