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Exoplanet atmospheres at high spectral resolution: toward statistical surveys

Romain Allart
Institut Trottier de recherche sur les exoplanètes, Université de Montereal

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 on 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 the homogeneous study of the upper atmosphere of 11 exoplanets observed with SPIRou through the near-infrared helium triplet. Finally, I will outline the new NIRPS spectrograph along the objectives, and the first results of its consortium as well as their 725 nights of guaranteed time observations.

2023 July 05, 13:30

Centro de Astrofísica da Universidade do Porto (Auditorium)
Rua das Estrelas, 4150-762 Porto

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia