CAPA. Seminario. Jorge Sanz Forcada (Investigador Científico en el Centro de Astrobiología, del INTA-CSIC)

Jorge Sanz Forcada 
 (Investigador Científico en el Centro de Astrobiología, del INTA-CSIC )

Título: Extrasolar planets: a radiation diet 

Resumen: 

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.

Fecha: jueves, 16 de enero de 2025
Hora:   12:00 horas
Lugar: Seminario de Física Atómica, Molecular y Nuclear