Sulfur dioxide in the mid-infrared transmission spectrum of WASP-39b

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dc.contributor.authorPowell, Diana
dc.contributor.authorFeinstein, Adina D.
dc.contributor.authorLee, Elspeth K. H.
dc.contributor.authorZhang, Michael
dc.contributor.authorTsai, Shang-Min
dc.contributor.authorTaylor, Jake
dc.contributor.authorKirk, James
dc.contributor.authorBell, Taylor
dc.contributor.authorBarstow, Joanna
dc.contributor.authorGao, Peter
dc.contributor.authorBean, Jacob
dc.contributor.authorBlecic, Jasmina
dc.contributor.authorChubb, Katy L.
dc.contributor.authorCrossfield, Ian J. M.
dc.contributor.authorJordan, Sean
dc.contributor.authorKitzmann, Daniel
dc.contributor.authorMoran, Sarah E.
dc.contributor.authorMorello, Giuseppe
dc.contributor.authorMoses, Julianne
dc.contributor.authorWelbanks, Luis
dc.contributor.authorYang, Jeehyun
dc.contributor.authorZhang, Xi
dc.contributor.authorAhrer, Eva-Maria
dc.contributor.authorBello-Arufe, Aaron
dc.contributor.authorBrande, Jonathan
dc.contributor.authorCasewell S.L.
dc.contributor.authorCrouzet, Nicolas
dc.contributor.authorCubillos, Patricio E.
dc.contributor.authorDemory, Brice-Olivier
dc.contributor.authorDyrek, Achrène
dc.contributor.authorFlagg, Laura
dc.contributor.authorHu, Renyu
dc.contributor.authorInglis, Julie
dc.contributor.authorJones, Kathryn D.
dc.contributor.authorKreidberg, Laura
dc.contributor.authorLópez-Morales, Mercedes
dc.contributor.authorLagage, Pierre-Olivier
dc.contributor.authorMeier Valdés, Erik A.
dc.contributor.authorMiguel, Yamila
dc.contributor.authorParmentier, Vivien
dc.contributor.authorPiette, Anjali A. A.
dc.contributor.authorRackham, Benjamin V.
dc.contributor.authorRadica, Michael
dc.contributor.authorRedfield, Seth
dc.contributor.authorStevenson, Kevin B.
dc.contributor.authorWakeford, Hannah R.
dc.contributor.authorAggarwal, Keshav
dc.contributor.authorAlam, Munazza K.
dc.contributor.authorBatalha, Natalie M.
dc.contributor.authorBatalha, Natasha E.
dc.contributor.authorBenneke, Björn
dc.contributor.authorBerta-Thompson, Zach K.
dc.contributor.authorBrady, Ryan P.
dc.contributor.authorCaceres, Claudio
dc.contributor.authorCarter, Aarynn L.
dc.contributor.authorDésert, Jean-Michel
dc.contributor.authorHarrington, Joseph
dc.contributor.authorIro, Nicolas
dc.contributor.authorLine, Michael R.
dc.contributor.authorLothringer, Joshua D.
dc.contributor.authorMacDonald, Ryan J.
dc.contributor.authorMancini, Luigi
dc.contributor.authorMolaverdikhani, Karan
dc.contributor.authorMukherjee, Sagnick
dc.contributor.authorNixon, Matthew C.
dc.contributor.authorOza, Apurva V.
dc.contributor.authorPalle, Enric
dc.contributor.authorRustamkulov, Zafar
dc.contributor.authorSing, David K.
dc.contributor.authorSteinrueck, Maria E.
dc.contributor.authorVenot, Olivia
dc.contributor.authorWheatley, Peter J.
dc.contributor.authorYurchenko, Sergei N.
dc.date.accessioned2024-09-26T18:09:29Z
dc.date.available2024-09-26T18:09:29Z
dc.date.issued2024-12
dc.descriptionIndexación: Scopus.
dc.description.abstractThe recent inference of sulfur dioxide (SO2) in the atmosphere of the hot (approximately 1,100 K), Saturn-mass exoplanet WASP-39b from near-infrared JWST observations1–3 suggests that photochemistry is a key process in high-temperature exoplanet atmospheres4. This is because of the low (<1 ppb) abundance of SO2 under thermochemical equilibrium compared with that produced from the photochemistry of H2O and H2S (1–10 ppm)4–9. However, the SO2 inference was made from a single, small molecular feature in the transmission spectrum of WASP-39b at 4.05 μm and, therefore, the detection of other SO2 absorption bands at different wavelengths is needed to better constrain the SO2 abundance. Here we report the detection of SO2 spectral features at 7.7 and 8.5 μm in the 5–12-μm transmission spectrum of WASP-39b measured by the JWST Mid-Infrared Instrument (MIRI) Low Resolution Spectrometer (LRS)10. Our observations suggest an abundance of SO2 of 0.5–25 ppm (1σ range), consistent with previous findings4. As well as SO2, we find broad water-vapour absorption features, as well as an unexplained decrease in the transit depth at wavelengths longer than 10 μm. Fitting the spectrum with a grid of atmospheric forward models, we derive an atmospheric heavy-element content (metallicity) for WASP-39b of approximately 7.1–8.0 times solar and demonstrate that photochemistry shapes the spectra of WASP-39b across a broad wavelength range.
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85185457663&origin=resultslist&sort=plf-f&src=s&sid=e19a9ee1aa7fd58f2f3b2af49eb7c27c&sot=aff&sdt=cl&cluster=scosubjabbr%2C%22MULT%22%2Ct%2Bscofreetoread%2C%22all%22%2Ct%2C%22publisherfullgold%22%2Ct%2Bscoafid%2C%2260002636%22%2Ct&s=AF-ID%2860002636%29+AND+SUBJAREA%28MULT%29&sl=34&sessionSearchId=e19a9ee1aa7fd58f2f3b2af49eb7c27c&relpos=18
dc.identifier.citationNature Open Access Volume 626, Issue 8001, Pages 979 - 98329 February 2024
dc.identifier.doi10.1038/s41586-024-07040-9
dc.identifier.issn00280836
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/60572
dc.publisherNature Research
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAtmosphere
dc.subjectExtraterrestrial Environment
dc.subjectLight
dc.subjectPhotochemistry
dc.subjectSulfur Dioxide
dc.titleSulfur dioxide in the mid-infrared transmission spectrum of WASP-39b
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