Early Release Science of the exoplanet WASP-39b with JWST NIRSpec G395H.

ABSTRACT: Measuring the abundances of carbon and oxygen in exoplanet atmospheres is considered a crucial avenue for unlocking the formation and evolution of exoplanetary systems^1,2. Access to the chemical inventory of an exoplanet requires high-precision observations, often inferred from individual molecular detections with low-resolution space-based^3-5 and high-resolution ground-based^6-8 facilities. Here we report the medium-resolution (R ≈ 600) transmission spectrum of an exoplanet atmosphere between 3 and 5 μm covering several absorption features for the Saturn-mass exoplanet WASP-39b (ref. ⁹), obtained with the Near Infrared Spectrograph (NIRSpec) G395H grating of JWST. Our observations achieve 1.46 times photon precision, providing an average transit

SUBMITTER: Alderson L 

PROVIDER: S-EPMC9946835 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature