Jorge Sanz Forcada, Investigador Científico en el Centro de Astrobiología, del INTA-CSIC
Abstract: Currently known extrasolar planets population is biased towards short-period planets. They tend to be highly irradiated. Photons in the XUV range (1-912 A) are of special importance in this context because they ionize neutral H atoms, yielding planetary atmosphere photoevaporation, which in turn results in non-negligible planet mass loss rates. This mechanism has been proposed to explain the distribution of planets in the mass-radius diagram. The XUV stellar irradiation is not only important in the photoevaporation processes, but also in the formation of the He I 10830 A triplet, which is also used to test the planet atmospheric losses. In this talk I will introduce a recent work in which we demonstrate how tight is the link between this triplet and the XUV stellar irradiation, aside from the photoevaporation process.
Jueves 16 de enero, 12 horas, seminario de Física Nuclear
