Identification of carbon dioxide in an exoplanet atmosphere.

ABSTRACT: Carbon dioxide (CO₂) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO₂ is an indicator of the metal enrichment (that is, elements heavier than helium, also called 'metallicity')^1-3, and thus the formation processes of the primary atmospheres of hot gas giants^4-6. It is also one of the most promising species to detect in the secondary atmospheres of terrestrial exoplanets^7-9. Previous photometric measurements of transiting planets with the Spitzer Space Telescope have given hints of the presence of CO₂, but have not yielded definitive detections owing to the lack of unambiguous spectroscopic identification^10-12. Here we present the detection of CO

SUBMITTER: JWST Transiting Exoplanet Community Early Release Science Team 

PROVIDER: S-EPMC9946830 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature