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Showing 1–7 of 7 results

Advanced filters: Author: Pascal Tremblin Clear advanced filters

Combined analysis of the 12.8 and 15 μm JWST/MIRI eclipse observations of TRAPPIST-1 b

Simultaneous observations of TRAPPIST-1 b from JWST at 12.8 and 15 μm indicate that it is probably a bare rock with a mineral-rich surface. However, an alternative scenario with a CO₂-rich atmosphere and hazes could also explain the observations.

Elsa Ducrot
Pierre-Olivier Lagage
Gillian Wright
Research16 Dec 2024
Nature Astronomy

Volume: 9, P: 358-369
A warm Neptune’s methane reveals core mass and vigorous atmospheric mixing

Observations of the warm Neptune WASP-107b show that the planet has a hot interior with an intrinsic temperature of about 460 K.

David K. Sing
Zafar Rustamkulov
Jeff A. Valenti
ResearchOpen Access20 May 2024
Nature

Volume: 630, P: 831-835
SO₂, silicate clouds, but no CH₄ detected in a warm Neptune

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
Research15 Nov 2023
Nature

Volume: 625, P: 51-54
¹⁵NH₃ in the atmosphere of a cool brown dwarf

Observations from the JWST MIRI showed the detection of ¹⁴NH₃ and ¹⁵NH₃ isotopologues in the atmosphere of a cool brown dwarf, along with a ¹⁴N/¹⁵N value consistent with star-like formation by gravitational collapse.

David Barrado
Paul Mollière
Gillian Wright
Research06 Nov 2023
Nature

Volume: 624, P: 263-266
Photochemically produced SO₂ in the atmosphere of WASP-39b

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 Access26 Apr 2023
Nature

Volume: 617, P: 483-487
Identification of carbon dioxide in an exoplanet atmosphere

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 Access02 Sept 2022
Nature

Volume: 614, P: 649-652
An ultrahot gas-giant exoplanet with a stratosphere

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
Research03 Aug 2017
Nature

Volume: 548, P: 58-61