Published 2023
| Version v1
Journal article
Early Release Science of the exoplanet WASP-39b with JWST NIRSpec G395H
Creators
- Alderson, Lili
- Wakeford, Hannah R.
- Alam, Munazza K.
- Batalha, Natasha E.
- Lothringer, Joshua D.
- Adams Redai, Jeá I.
- Barat, Saugata
- Brande, Jonathan
- Damiano, Mario
- Daylan, Tansu
- Espinoza, Néstor
- Flagg, Laura S.
- Goyal, Jayesh M.
- Grant, David
- Hu, Renyu
- Inglis, Julie
- Lee, Elspeth K.H.
- Mikal-Evans, Thomas
- Ramos-Rosado, Lakeisha
- Roy, Pierre Alexis
- Wallack, Nicole L.
- Batalha, Natalie M.
- Bean, Jacob L.
- Benneke, Björn
- Berta-Thompson, Zachory K.
- Carter, Aarynn L.
- Changeat, Quentin
- Colón, Knicole D.
- Crossfield, Ian J.M.
- Désert, Jean Michel
- Foreman-Mackey, Daniel T.
- Gibson, Neale P.
- Kreidberg, Laura
- Line, Michael R.
- López-Morales, Mercedes
- Molaverdikhani, Karan
- Moran, Sarah E.
- Morello, Giuseppe
- Moses, Julianne I.
- Mukherjee, Sagnick
- Schlawin, Everett A.
- Sing, David K.
- Stevenson, Kevin B.
- Taylor, Jake
- Aggarwal, Keshav
- Ahrer, Eva Maria
- Allen, Natalie H.
- Barstow, Joanna K.
- Bell, Taylor J.
- Blecic, Jasmina
- Casewell, Sarah L.
- Chubb, Katy L.
- Crouzet, Nicolas
- Cubillos, Patricio E.
- Decin, Leen
- Feinstein, Adina D.
- Fortney, Joanthan J.
- Harrington, Joseph
- Heng, Kevin
- Iro, Nicolas
- Kempton, Eliza Miller Ricci
- Kirk, James
- Knutson, Heather A.
- Krick, Jessica E.
- Leconte, Jérémy
- Lendl, Monika A.
- Macdonald, Ryan J.
- Mancini, Luigi
- Mansfield, Megan
- May, Erin M.
- Mayne, Nathan J.
- Miguel, Yamila
- Nikolov, Nikolay K.
- Ohno, Kazumasa
- Palle, Enric
- Parmentier, Vivien
- Petit Dit de la Roche, Dominique J.M.
- Piaulet, Caroline
- Powell, Diana K.
- Rackham, Benjamin V.
- Redfield, Seth L.
- Rogers, Laura K.
- Rustamkulov, Zafar
- Tan, Xianyu
- Tremblin, Pascal
- Tsai, Shangmin
- Turner, Jake D.
- de Val-Borro, Miguel
- Venot, Olivia
- Welbanks, Luis
- Wheatley, Peter J.
- Zhang, Xi
Contributors
Others:
- Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
- Maison de la Simulation (MDLS) ; Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut National de Recherche en Informatique et en Automatique (Inria)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
- National Aeronautics and Space Administration, NASA; Space Telescope Science Institute, STScI; Canadian Space Agency, CSA: NAS 5-03127; Science and Technology Facilities Council, STFC: ST/W507337/1; European Space Agency, ESA; School of Physics, University of Bristol
- This work is based on observations made with the NASA/ESA/CSA JWST. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for the JWST. These observations are associated with programme JWST-ERS-01366. Support for programme JWST-ERS-01366 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127. L.A. acknowledges funding from STFC grant ST/W507337/1 and from the University of Bristol School of Physics PhD Scholarship Fund.
- This work is based on observations made with the NASA/ESA/CSA JWST. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for the JWST. These observations are associated with programme JWST-ERS-01366. Support for programme JWST-ERS-01366 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127. L.A. acknowledges funding from STFC grant ST/W507337/1 and from the University of Bristol School of Physics PhD Scholarship Fund.
Description
Measuring the abundances of carbon and oxygen in exoplanet atmospheres is considered a crucial avenue for unlocking the formation and evolution of exoplanetary systems1,2. Access to the chemical inventory of an exoplanet requires high-precision observations, often inferred from individual molecular detections with low-resolution space-based3–5 and high-resolution ground-based6–8 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 depth uncertainty of 221 ppm per spectroscopic bin, and present minimal impacts from systematic effects. We detect significant absorption from CO2 (28.5σ) and H2O (21.5σ), and identify SO2 as the source of absorption at 4.1 μm (4.8σ). Best-fit atmospheric models range between 3 and 10 times solar metallicity, with sub-solar to solar C/O ratios. These results, including the detection of SO2, underscore the importance of characterizing the chemistry in exoplanet atmospheres and showcase NIRSpec G395H as an excellent mode for time-series observations over this critical wavelength range10.
Abstract
International audienceAdditional details
Identifiers
- URL
- https://hal.science/hal-04122511
- URN
- urn:oai:HAL:hal-04122511v1
Origin repository
- Origin repository
- UNICA