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Showing 1–10 of 10 results
Advanced filters: Author: Thomas J Barstow Clear advanced filters

  • JWST observations suggest that both pebbles and planetesimals played an important role in forming the giant exoplanet WASP-121 b beyond the H2O ice line. They also indicate that strong vertical mixing likely drives the nightside atmospheric chemistry.

    • Thomas M. Evans-Soma
    • David K. Sing
    • Mark S. Marley
    ResearchOpen Access
    Nature Astronomy
    Volume: 9, P: 845-861

  • Time-series observations from the JWST of the transiting exoplanet WASP-39b show gaseous water in the planet’s atmosphere and place an upper limit on the abundance of methane.

    • Eva-Maria Ahrer
    • Kevin B. Stevenson
    • Xi Zhang
    ResearchOpen Access
    Nature
    Volume: 614, P: 653-658

  • 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.

    • Adina D. Feinstein
    • Michael Radica
    • Xi Zhang
    ResearchOpen Access
    Nature
    Volume: 614, P: 670-675

  • The medium-resolution transmission spectrum of the exoplanet WASP-39b, described using observations from the Near Infrared Spectrograph G395H grating aboard JWST, shows significant absorption from CO2 and H2O and detection of SO2.

    • Lili Alderson
    • Hannah R. Wakeford
    • Xi Zhang
    ResearchOpen Access
    Nature
    Volume: 614, P: 664-669

  • Phase-resolved mid-infrared observations from JWST of the hot gas giant WASP-43b detect a day–night difference of 659 ± 19 K. Comparison with climate models shows that the observations are compatible with cloudy skies, at least on the nightside, and the lack of methane detection suggests the presence of disequilibrium chemistry.

    • Taylor J. Bell
    • Nicolas Crouzet
    • Sebastian Zieba
    ResearchOpen Access
    Nature Astronomy
    Volume: 8, P: 879-898

  • Transmission spectroscopy observations from the James Webb Space Telescope show the detection of carbon dioxide in the atmosphere of the gas giant exoplanet WASP-39b.

    • Eva-Maria Ahrer
    • Lili Alderson
    • Sebastian Zieba
    ResearchOpen Access
    Nature
    Volume: 614, P: 649-652

  • Ultrahot giant planet WASP-121b has a stratosphere that warms up with altitude during the day and cools down with altitude during the night. This trend is in agreement with predictions from circulation models in chemical equilibrium. Efficient vertical mixing hinders condensation of at least some refractory materials.

    • Thomas Mikal-Evans
    • David K. Sing
    • Jessica J. Spake
    ResearchOpen Access
    Nature Astronomy
    Volume: 6, P: 471-479

  • Observations of the gas-giant exoplanet WASP-121b reveal near-infrared emission lines of water, suggesting that the planet has a stratosphere—a layer in the upper atmosphere where temperature increases with altitude.

    • Thomas M. Evans
    • David K. Sing
    • Roxana Lupu
    Research
    Nature
    Volume: 548, P: 58-61