Details

Autor(en) / Beteiligte

• Feinstein, Adina D.
• Radica, Michael
• Welbanks, Luis
• Murray, Catriona Anne
• Ohno, Kazumasa
• Coulombe, Louis-Philippe
• Espinoza, Néstor
• Bean, Jacob L.
• Teske, Johanna K.
• Benneke, Björn
• Line, Michael R.
• Rustamkulov, Zafar
• Saba, Arianna
• Tsiaras, Angelos
• Barstow, Joanna K.
• Fortney, Jonathan J.
• Gao, Peter
• Knutson, Heather A.
• MacDonald, Ryan J.
• Mikal-Evans, Thomas
• Rackham, Benjamin V.
• Taylor, Jake
• Parmentier, Vivien
• Batalha, Natalie M.
• Berta-Thompson, Zachory K.
• Carter, Aarynn L.
• Changeat, Quentin
• dos Santos, Leonardo A.
• Gibson, Neale P.
• Goyal, Jayesh M.
• Kreidberg, Laura
• López-Morales, Mercedes
• Lothringer, Joshua D.
• Miguel, Yamila
• Molaverdikhani, Karan
• Moran, Sarah E.
• Morello, Giuseppe
• Mukherjee, Sagnick
• Sing, David K.
• Stevenson, Kevin B.
• Wakeford, Hannah R.
• Ahrer, Eva-Maria
• Alam, Munazza K.
• Alderson, Lili
• Allen, Natalie H.
• Batalha, Natasha E.
• Bell, Taylor J.
• Blecic, Jasmina
• Brande, Jonathan
• Caceres, Claudio
• Casewell, S. L.
• Chubb, Katy L.
• Crossfield, Ian J. M.
• Crouzet, Nicolas
• Cubillos, Patricio E.
• Decin, Leen
• Désert, Jean-Michel
• Harrington, Joseph
• Heng, Kevin
• Henning, Thomas
• Iro, Nicolas
• Kempton, Eliza M.-R.
• Kendrew, Sarah
• Kirk, James
• Krick, Jessica
• Lagage, Pierre-Olivier
• Lendl, Monika
• Mancini, Luigi
• Mansfield, Megan
• May, E. M.
• Mayne, N. J.
• Nikolov, Nikolay K.
• Palle, Enric
• Petit dit de la Roche, Dominique J. M.
• Piaulet, Caroline
• Powell, Diana
• Redfield, Seth
• Rogers, Laura K.
• Roman, Michael T.
• Roy, Pierre-Alexis
• Nixon, Matthew C.
• Schlawin, Everett
• Tan, Xianyu
• Tremblin, P.
• Turner, Jake D.
• Venot, Olivia
• Waalkes, William C.
• Wheatley, Peter J.
• Zhang, Xi

Titel

Early Release Science of the exoplanet WASP-39b with JWST NIRISS

Ist Teil von

• Nature (London), 2023-02, Vol.614 (7949), p.670-675

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2023

Beschreibungen/Notizen

• The Saturn-mass exoplanet WASP-39b has been the subject of extensive efforts to determine its atmospheric properties using transmission spectroscopy 1 – 4 . However, these efforts have been hampered by modelling degeneracies between composition and cloud properties that are caused by limited data quality 5 – 9 . Here we present the transmission spectrum of WASP-39b obtained using the Single-Object Slitless Spectroscopy (SOSS) mode of the Near Infrared Imager and Slitless Spectrograph (NIRISS) instrument on the JWST. This spectrum spans 0.6–2.8 μm in wavelength and shows several water-absorption bands, the potassium resonance doublet and signatures of clouds. The precision and broad wavelength coverage of NIRISS/SOSS allows us to break model degeneracies between cloud properties and the atmospheric composition of WASP-39b, favouring a heavy-element enhancement (‘metallicity’) of about 10–30 times the solar value, a sub-solar carbon-to-oxygen (C/O) ratio and a solar-to-super-solar potassium-to-oxygen (K/O) ratio. The observations are also best explained by wavelength-dependent, non-grey clouds with inhomogeneous coverageof the planet’s terminator. The transmission spectrum of the exoplanet WASP-39b is obtained using observations from the Single-Object Slitless Spectroscopy mode of the Near Infrared Imager and Slitless Spectrograph instrument aboard the JWST.