Results 31 to 40 of about 59,298 (206)
Proceedings of the National Academy of Sciences of the United States of America, 2023 Significance Using a fully coupled, three-dimensional atmospheric chemistry-radiation-dynamics model, we demonstrate that the atmospheric composition of terrestrial exoplanets can be self-oscillatory under nonvarying external forcings. This finding could
Yangcheng Luo +4 more
semanticscholar +1 more source
VIRA: an exoplanet atmospheric retrieval framework for JWST transmission spectroscopy [PDF]
Monthly notices of the Royal Astronomical SocietyJWST observations are leading to important new insights into exoplanetary atmospheres through transmission spectroscopy. In order to harness the full potential of the broad spectral range and high sensitivity of JWST, atmospheric retrievals of ...
Savvas Constantinou, N. Madhusudhan
semanticscholar +1 more source
Wind of change: retrieving exoplanet atmospheric winds from high-resolution spectroscopy [PDF]
Astronomy & Astrophysics, 2019 Context. The atmosphere of exoplanets has been studied extensively in recent years, making use of numerical models to retrieve chemical composition, dynamical circulation, or temperature from the data. One of the best observational probes in transmission
J. Seidel +13 more
semanticscholar +1 more source
The Planetary Science Journal, 2023 Abstract Outgassing is a central process during the formation and evolution of terrestrial planets and their atmospheres both within and beyond the solar system. Although terrestrial planets’ early atmospheres likely form via outgassing during planetary accretion, the connection between a planet’s bulk composition and its
Maggie A. Thompson +7 more
openaire +3 more sources
MOVES – IV. Modelling the influence of stellar XUV-flux, cosmic rays, and stellar energetic particles on the atmospheric composition of the hot Jupiter HD 189733b [PDF]
, 2020 Hot Jupiters provide valuable natural laboratories for studying potential contributions of highenergy radiation to prebiotic synthesis in the atmospheres of exoplanets.
Patrick Barth +9 more
semanticscholar +1 more source
A Radiative-convective Model for Terrestrial Planets with Self-consistent Patchy Clouds
The Planetary Science Journal, 2023 Clouds are ubiquitous: they arise for every solar system planet that possesses an atmosphere and have also been suggested as a leading mechanism for obscuring spectral features in exoplanet observations.
James D. Windsor +5 more
doaj +1 more source
ELemental abundances of Planets and brown dwarfs Imaged around Stars (ELPIS). I. Potential Metal Enrichment of the Exoplanet AF Lep b and a Novel Retrieval Approach for Cloudy Self-luminous Atmospheres [PDF]
Astronomical Journal, 2023 AF Lep A+b is a remarkable planetary system hosting a gas-giant planet that has the lowest dynamical mass among directly imaged exoplanets. We present an in-depth analysis of the atmospheric composition of the star and planet to probe the planet’s ...
Z. Zhang 张 +12 more
semanticscholar +1 more source
The Astrophysical Journal Letters, 2023 Recently, the first JWST measurement of thermal emission from a rocky exoplanet was reported. The inferred dayside brightness temperature of TRAPPIST-1 b at 15 μ m is consistent with the planet having no atmosphere and therefore no mechanism by which to ...
Jegug Ih +3 more
doaj +1 more source
Early Release Science of the exoplanet WASP-39b with JWST NIRISS [PDF]
Nature, 2022 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.
A. Feinstein +88 more
semanticscholar +1 more source
The Astronomical Journal, 2023 TOI-270 d is a temperate sub-Neptune discovered by the Transiting Exoplanet Survey Satellite (TESS) around a bright ( J = 9.1 mag) M3V host star. With an approximate radius of 2 R _⊕ and equilibrium temperature of 350 K, TOI-270 d is one of the most ...
Thomas Mikal-Evans +8 more
doaj +1 more source