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| Paper: |
High-resolution Ultraviolet-to-Near-Infrared Characterization of Exoplanet Atmospheres with HWO |
| Monograph: |
10, HWO25 Proceedings Part I: Community Science Case Development Documents |
| Page: |
545 |
| Authors: |
Patricio E. Cubillos; Matteo Brogi; Antonio García Muñoz; Luca Fossati; Jasmina Blecic; Sudeshna Boro Saikia; Vincent Bourrier; Jose A. Caballero; Juan Cabrera,; Andrea Chiavassa; Andrzej Fludracc; Leonardos Gkouveliscc; John Lee Grenfellcc; Manuel Guedelcc; Gopal Hazracc; Alvaro Labianoc; Monika Lendl; Donna Rodgers-Lee; Arnaud Salvador,; Ilane Schroetter; Antoine Strugarek; Benjamin Taysum; Aline Vidotto; Thomas G. Wilson |
| DOI: |
10.26624/JBAH9865 |
| Abstract: |
The Habitable Worlds Observatory (HWO) offers a unique opportunity to revolutionize our understanding of planetary formation and evolution. The goal of this Science Case Development Document (SCDD) is
to investigate the physical and chemical processes that shape the composition and the mass-loss regimes of
planetary atmospheres. We review the key observables currently known as diagnostics of mass loss via transit
observations, i.e., absorption lines of escaping hydrogen (Ly-α), helium, and metals (Fe, Mg, C, O). We also
explore the challenges to infer planetary formation processes based on atmospheric composition characterization. HWO could enable a broad, continuous coverage from far-ultraviolet to near-infrared spectroscopy
(∼100–1800 nm) at high resolution (R≳60,000), which is essential to make these measurements, disentangle their planetary origin from stellar activity, and ultimately, contextualize the escape rates by simultaneously
characterizing the composition, cloud predominance, and thermal structure of exoplanet atmospheres. |
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