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

Autor(en): Z. Rustamkulov, D. K. Sing, S. Mukherjee, E. M. May, J. Kirk, E. Schlawin, M. R. Line, C. Piaulet, A. L. Carter, N. E. Batalha, J. M. Goyal, M. López-Morales, J. D. Lothringer, R. J. MacDonald, S. E. Moran, K. B. Stevenson, H. R. Wakeford, N. Espinoza, J. L. Bean, N. M. Batalha, B. Benneke, Z. K. Berta-Thompson, I. J.M. Crossfield, P. Gao, L. Kreidberg, D. K. Powell, P. E. Cubillos, N. P. Gibson, J. Leconte, K. Molaverdikhani, N. K. Nikolov, V. Parmentier, P. Roy, J. Taylor, J. D. Turner, P. J. Wheatley, K. Aggarwal, E. Ahrer, M. K. Alam, L. Alderson, N. H. Allen, A. Banerjee, S. Barat, D. Barrado, J. K. Barstow, T. J. Bell, J. Blecic, J. Brande, S. Casewell, Q. Changeat, K. L. Chubb, N. Crouzet, T. Daylan, L. Decin, J. Désert, T. Mikal-Evans, A. D. Feinstein, L. Flagg, J. J. Fortney, J. Harrington, K. Heng, Y. Hong, R. Hu, N. Iro, T. Kataria, E. M.R. Kempton, J. Krick, M. Lendl, J. Lillo-Box, A. Louca, J. Lustig-Yaeger, L. Mancini, M. Mansfield, N. J. Mayne, Y. Miguel, G. Morello, K. Ohno, E. Palle, D. J.M. Petit dit de la Roche, B. V. Rackham, M. Radica, L. Ramos-Rosado, S. Redfield, L. K. Rogers, E. L. Shkolnik, J. Southworth, J. Teske, P. Tremblin, G. S. Tucker, O. Venot, W. C. Waalkes, L. Welbanks, X. Zhang, S. Zieba
Abstrakt: Transmission spectroscopy^1–3 of exoplanets has revealed signatures of water vapour, aerosols and alkali metals in a few dozen exoplanet atmospheres^4,5. However, these previous inferences with the Hubble and Spitzer Space Telescopes were hindered by the observations’ relatively narrow wavelength range and spectral resolving power, which precluded the unambiguous identification of other chemical species—in particular the primary carbon-bearing molecules^6,7. Here we report a broad-wavelength 0.5–5.5 µm atmospheric transmission spectrum of WASP-39b⁸, a 1,200 K, roughly Saturn-mass, Jupiter-radius exoplanet, measured with the JWST NIRSpec’s PRISM mode⁹ as part of the JWST Transiting Exoplanet Community Early Release Science Team Program^10–12. We robustly detect several chemical species at high significance, including Na (19σ), H₂O (33σ), CO₂ (28σ) and CO (7σ). The non-detection of CH₄, combined with a strong CO₂ feature, favours atmospheric models with a super-solar atmospheric metallicity. An unanticipated absorption feature at 4 µm is best explained by SO₂ (2.7σ), which could be a tracer of atmospheric photochemistry. These observations demonstrate JWST’s sensitivity to a rich diversity of exoplanet compositions and chemical processes.
Organisation(en): Institut für Mathematik, Institut für Astrophysik
Externe Organisation(en): Johns Hopkins University Krieger School of Arts and Sciences, Johns Hopkins University, University of California, Santa Cruz, Harvard-Smithsonian Center for Astrophysics, Imperial College London, University of Arizona, Arizona State University, National Aeronautics & Space Administration (NASA), Utah Valley University, University of Michigan, Cornell University, University of Bristol, Space Telescope Science Institute, University of Chicago, University of Colorado, Boulder, University of Kansas, Carnegie Institution for Science, Max-Planck-Institut für Astronomie, INAF-Osservatorio Astrofisico di Torino, University of Dublin, Laboratoire d'Astrophysique de Bordeaux, Ludwig-Maximilians-Universität München, Université Côte d'Azur, University of Oxford, University of Warwick, Open University, University of Amsterdam (UvA), European Space Astronomy Centre (ESA), New York University Abu Dhabi, University of Leicester, University College London, University of St. Andrews, Leiden University, Princeton University, Katholieke Universiteit Leuven, University of Central Florida, California Institute of Technology (Caltech), University of Maryland, College Park, Universität Genf, Università degli Studi di Roma "Tor Vergata", University of Exeter, SRON Netherlands Institute for Space Research , Instituto de Astrofísica de Canarias (IAC), Universidad de La Laguna, Massachusetts Institute of Technology, Wesleyan University, University of Cambridge, Keele University, Université de Versailles-Saint-Quentin-en-Yvelines, Brown University, Université de Montréal, National Institute of Science Education and Research, Indian Institute of Technology, Indore, Université de Paris, Université Paris XII - Paris-Est-Créteil-Val-de-Marne
Journal: Nature
Band: 614
Seiten: 659-663
Anzahl der Seiten: 5
ISSN: 0028-0836
DOI: https://doi.org/10.1038/s41586-022-05677-y
Publikationsdatum: 02-2023
Peer-reviewed: Ja
ÖFOS 2012: 103004 Astrophysik
ASJC Scopus Sachgebiete: General
Link zum Portal: https://ucrisportal.univie.ac.at/de/publications/65272b28-6fe8-4e3d-b136-69656aa08457

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