Exoplanetary atmospheres at high spectral resolution : hydrogen, helium, iron, … What can we learn ?

Séminaire IPAG de Aurélien Wyttenbach (IPAG), jeudi 18 juin 2020, 11h00, online seminar

Observations of exoplanet atmospheres allow us to characterize several of these remote worlds. Indeed, the measurement of planetary spectra are rich in information about these planets’ physical and chemical conditions.

The parameter space explored by exoplanetary atmospheres is much larger than the one in the Solar system. This allow us to explore complicated phenomenons, such as radiative transfer, atmospheric circulation, atmospheric escape, chemical (dis)equilibrium, cloud formation, photochemistry, etc. Thus, the study of exoplanetary atmospheres are motivated by the possibility that they can provide crucial hints about their origin and evolution.

In this online seminar, we are going to review recent measurements of upper atmospheres obtained with the high-resolution technics. Then, we will try to answer the following question : How close-in exoplanets react to the extreme irradiation from their host star ?