Calendar

Nov
19
mar
Minghui Xu – TBD @ B18N, Salle Univers
Nov 19 @ 11 h 00 min – 12 h 30 min
Séminaire

Titre: TBD
Abstract:

TBD

Nov
26
mar
Romain Allart – Exoplanet atmospheres at high spectral resolution: toward statistical surveys @ B18N, Salle Renaudot
Nov 26 @ 11 h 00 min – 12 h 30 min
Séminaire

Titre: Exoplanet atmospheres at high spectral resolution: toward statistical surveys
Abstract:
Astronomy has a bright future in the coming decades with (1) state-of-the-art telescopes such as the James Webb Space Telescope and the Extremely Large Telescopes leading to unprecedented in-depth characterization and (2) the multiplication of small ground-based instruments and space missions unlocking large-scale surveys. The field of exoplanets is no exception, with intended groundbreaking results in their demography, formation, evolution, chemistry, and potential detections of Earth-like planets and biosignatures. By analyzing the atmosphere of exoplanets, we can determine their chemistry, dynamics, and climate, delivering knowledge on the evolution and formation of exoplanets. At high spectral resolution, planetary lines are resolved, which provides more details on the atmospheric structure, and their profile informs us on their dynamic (wind patterns, atmospheric escape, …). In this talk, I will present how, in the near future, medium-class telescopes with state-of-the-art high spectral resolution spectrographs can be used to build atmospheric surveys, enabling statistical constraints on the evolution and formation of exoplanets. I will discuss how SPIRou can lead to the homogeneous study of the upper atmosphere of 11 exoplanets through the near-infrared helium triplet. To conclude, I will present the NIRPS spectrograph, the objectives of its consortium, and its first atmospheric results.