Details

Autor(en) / Beteiligte

• Ahrer, Eva-Maria
• Alderson, Lili
• Batalha, Natalie M.
• Batalha, Natasha E.
• Bean, Jacob L.
• Beatty, Thomas G.
• Bell, Taylor J.
• Benneke, Björn
• Berta-Thompson, Zachory K.
• Carter, Aarynn L.
• Espinoza, Néstor
• Feinstein, Adina D.
• Fortney, Jonathan J.
• Gibson, Neale P.
• Kempton, Eliza M.-R.
• Kirk, James
• Kreidberg, Laura
• López-Morales, Mercedes
• Lothringer, Joshua D.
• Moran, Sarah E.
• Mukherjee, Sagnick
• Ohno, Kazumasa
• Parmentier, Vivien
• Piaulet, Caroline
• Rustamkulov, Zafar
• Schlawin, Everett
• Sing, David K.
• Stevenson, Kevin B.
• Wakeford, Hannah R.
• Allen, Natalie H.
• Birkmann, Stephan M.
• Brande, Jonathan
• Cubillos, Patricio E.
• Damiano, Mario
• Désert, Jean-Michel
• Gao, Peter
• Harrington, Joseph
• Hu, Renyu
• Kendrew, Sarah
• Knutson, Heather A.
• Lagage, Pierre-Olivier
• Leconte, Jérémy
• Lendl, Monika
• MacDonald, Ryan J.
• May, E. M.
• Miguel, Yamila
• Molaverdikhani, Karan
• Moses, Julianne I.
• Murray, Catriona Anne
• Petit dit de la Roche, D. J. M.
• Roy, Pierre-Alexis
• Taylor, Jake
• Wachiraphan, Patcharapol
• Welbanks, Luis
• Wheatley, Peter J.
• Barstow, Joanna K.
• Casewell, S. L.
• Changeat, Quentin
• Chubb, K. L.
• Colón, Knicole D.
• Coulombe, Louis-Philippe
• Daylan, Tansu
• de Val-Borro, Miguel
• Flagg, Laura
• Fu, Guangwei
• Glidden, Ana
• Grant, David
• Henning, Thomas
• Hong, Yu-Cian
• Inglis, Julie
• Iro, Nicolas
• Kataria, Tiffany
• Komacek, Thaddeus D.
• Lee, Elspeth K. H.
• Lillo-Box, Jorge
• Mancini, Luigi
• Mandell, Avi M.
• Mansfield, Megan
• Morello, Giuseppe
• Nixon, Matthew C.
• Piette, Anjali A. A.
• Powell, Diana
• Rackham, Benjamin V.
• Ramos-Rosado, Lakeisha
• Rauscher, Emily
• Redfield, Seth
• Rogers, Laura K.
• Roman, Michael T.
• Roudier, Gael M.
• Shkolnik, Evgenya L.
• Spake, Jessica J.
• Tan, Xianyu
• Teske, Johanna K.
• Tsai, Shang-Min
• Tucker, Gregory S.
• Turner, Jake D.
• Valenti, Jeff A.
• Waldmann, Ingo P.
• Wallack, Nicole L.
• Zhang, Xi

Titel

Identification of carbon dioxide in an exoplanet atmosphere

Ist Teil von

• Nature (London), 2023-02, Vol.614 (7949), p.649-652

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2023

Beschreibungen/Notizen

• Carbon dioxide (CO ) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO is an indicator of the metal enrichment (that is, elements heavier than helium, also called 'metallicity') , and thus the formation processes of the primary atmospheres of hot gas giants . It is also one of the most promising species to detect in the secondary atmospheres of terrestrial exoplanets . Previous photometric measurements of transiting planets with the Spitzer Space Telescope have given hints of the presence of CO , but have not yielded definitive detections owing to the lack of unambiguous spectroscopic identification . Here we present the detection of CO in the atmosphere of the gas giant exoplanet WASP-39b from transmission spectroscopy observations obtained with JWST as part of the Early Release Science programme . The data used in this study span 3.0-5.5 micrometres in wavelength and show a prominent CO absorption feature at 4.3 micrometres (26-sigma significance). The overall spectrum is well matched by one-dimensional, ten-times solar metallicity models that assume radiative-convective-thermochemical equilibrium and have moderate cloud opacity. These models predict that the atmosphere should have water, carbon monoxide and hydrogen sulfide in addition to CO , but little methane. Furthermore, we also tentatively detect a small absorption feature near 4.0 micrometres that is not reproduced by these models.