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Showing 1–21 of 21 results
Advanced filters: Author: Renyu Hu Clear advanced filters

  • Observations from the JWST MIRI/LRS show the detection of SO2 spectral features in the 5–12-μm transmission spectrum of the hot, Saturn-mass exoplanet WASP-39b, suggesting that photochemistry is a key process in high-temperature exoplanet atmospheres.

    • Diana Powell
    • Adina D. Feinstein
    • Sergei N. Yurchenko
    ResearchOpen Access
    Nature
    Volume: 626, P: 979-983

  • Recent modelling suggests that Earth-mass planets in the habitable zones of Sun-like stars could evolve into rocky worlds topped by helium-dominated atmospheres.

    • Renyu Hu
    News & Views
    Nature Astronomy
    Volume: 9, P: 943-944

  • Mars likely evolved from a warmer, wetter early state to the cold, arid current climate, but this evolution is not reflected in recent observations and measurements. Here, the authors derive quantitative constraints on the atmospheric pressure through time, identifying a mechanism that explains the carbon data.

    • Renyu Hu
    • David M. Kass
    • Yuk L. Yung
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-9

  • The thermal emission spectrum of the rocky exoplanet 55 Cancri e obtained by the NIRCAM and MIRI instruments aboard the JWST indicates that it has a secondary volatile-rich atmosphere, possibly arising from a magma ocean.

    • Renyu Hu
    • Aaron Bello-Arufe
    • Brice-Olivier Demory
    Research
    Nature
    Volume: 630, P: 609-612

  • Photochemical modelling suggests that H2 outgassing from crustal hydration could have supported transient warming episodes on early Mars in a CO2-rich atmosphere with abrupt transitions to cold climate states in a CO-rich atmosphere.

    • Danica Adams
    • Markus Scheucher
    • Yuk L. Yung
    Research
    Nature Geoscience
    Volume: 18, P: 133-139

  • 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

  • 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 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

  • Observations from the JWST show the presence of a spectral absorption feature at 4.05 μm arising from SO2 in the atmosphere of the gas giant exoplanet WASP-39b, which is produced by photochemical processes and verified by numerical models.

    • Shang-Min Tsai
    • Elspeth K. H. Lee
    • Sergei N. Yurchenko
    ResearchOpen Access
    Nature
    Volume: 617, P: 483-487

  • Marine emissions of N2O could have sustained an early Archaean atmosphere of 0.8–6.0 ppb N2O without a protective ozone layer, according to mineral incubations combined with diffusion and photochemical modelling.

    • Steffen Buessecker
    • Hiroshi Imanaka
    • Hinsby Cadillo-Quiroz
    Research
    Nature Geoscience
    Volume: 15, P: 1056-1063

  • The detection of thermal emission from the rocky exoplanet TRAPPIST-1 c using the Mid-Infrared Instrument on the James Webb Space Telescope reveals a dayside brightness temperature that disfavours a thick, CO2-rich atmosphere.

    • Sebastian Zieba
    • Laura Kreidberg
    • Gabrielle Suissa
    ResearchOpen Access
    Nature
    Volume: 620, P: 746-749

  • 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

  • A longitudinal thermal brightness map of the super-Earth exoplanet 55 Cancri e reveals strong day–night temperature contrast, indicating inefficient heat redistribution consistent with 55 Cancri e either being devoid of atmosphere or having an optically thick atmosphere with heat recirculation confined to the planetary dayside.

    • Brice-Olivier Demory
    • Michael Gillon
    • Didier Queloz
    Research
    Nature
    Volume: 532, P: 207-209

  • The JWST has the potential to increase our understanding of terrestrial exoplanets and their atmospheres, but the various signal contaminations need to be isolated and quantified. Using JWST Cycle 1 observations of TRAPPIST-1 as a benchmark, this Perspective proposes a series of steps to use future JWST data efficiently for this purpose.

    • Julien de Wit
    • René Doyon
    • Michael J. Way
    Reviews
    Nature Astronomy
    Volume: 8, P: 810-818