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Showing 1–13 of 13 results
Advanced filters: Author: Elsa Ducrot Clear advanced filters
  • Analysis of data from multiple instruments reveals a giant exoplanet in orbit around the 0.2-solar-mass star TOI-6894. The existence of this exoplanetary system challenges assumptions about planet formation and it is an excellent target for atmospheric characterization.

    • Edward M. Bryant
    • Andrés Jordán
    • Sebastián Zúñiga-Fernández
    ResearchOpen Access
    Nature Astronomy
    P: 1-14
  • 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
  • Combining the infrared capabilities of JWST and synthetic tracking techniques, the detection of some of the smallest asteroids ever observed in the main belt is reported; their large abundance reveals a population driven by collisional cascade.

    • Artem Y. Burdanov
    • Julien de Wit
    • Sebastian Zieba
    Research
    Nature
    Volume: 638, P: 74-78
  • 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
  • Precise mass and radius measurements of giant planet WASP-193 b find an extremely low density of 0.059 ± 0.014 g cm−3. Current evolutionary models cannot fully explain such a low density, but the extended atmosphere makes WASP-193 b very suitable for high-precision characterization via JWST.

    • Khalid Barkaoui
    • Francisco J. Pozuelos
    • Richard G. West
    Research
    Nature Astronomy
    Volume: 8, P: 909-919
  • The JWST MIRI transmission spectrum of WASP-107b, a transiting planet with Neptune-like mass and Jupiter-like radius, shows observations of sulfur dioxide and silicate clouds but no methane in its atmosphere, providing evidence of disequilibrium chemistry and active photochemistry.

    • Achrène Dyrek
    • Michiel Min
    • Gillian Wright
    Research
    Nature
    Volume: 625, P: 51-54
  • Observations from the James Webb Space Telescope suggest that the exoplanet TRAPPIST-1 b has little or no planetary atmosphere and no detectable atmospheric absorption of carbon dioxide.

    • Thomas P. Greene
    • Taylor J. Bell
    • Jonathan J. Fortney
    Research
    Nature
    Volume: 618, P: 39-42
  • The authors report on a temperate Earth-sized planet orbiting the cool M6 dwarf LP 791-18 with a radius of 1.03 ± 0.04 R⊕ and an equilibrium temperature of 300–400 K, with the permanent night side plausibly allowing for water condensation.

    • Merrin S. Peterson
    • Björn Benneke
    • Thomas Barclay
    Research
    Nature
    Volume: 617, P: 701-705
  • A spectroscopic thermal phase curve of GJ 1214b obtained with the JWST in the mid-infrared is reported and a planet with a high metallicity atmosphere blanketed by thick and reflective clouds or haze is found.

    • Eliza M.-R. Kempton
    • Michael Zhang
    • Peter McGill
    Research
    Nature
    Volume: 620, P: 67-71
  • 2M1510 is an approximately 45-million-year-old triple system of brown dwarfs, two of which form a close binary in a 20-day orbit and have almost the same mass (3.82% and 3.75% of the mass of the Sun, respectively). Their physical parameters are in good agreement with evolutionary models except for luminosity, suggesting that we might be underestimating the masses of brown dwarfs and massive exoplanets by about 30%.

    • Amaury H. M. J. Triaud
    • Adam J. Burgasser
    • Michaël Gillon
    Research
    Nature Astronomy
    Volume: 4, P: 650-657
  • 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