Results 1 to 10 of about 1,870,265 (176)

Patchy Forsterite Clouds in the Atmospheres of Two Highly Variable Exoplanet Analogs

open access: yesThe Astrophysical Journal, 2023
We present an atmospheric retrieval analysis of a pair of highly variable, ∼200 Myr old, early T type planetary-mass exoplanet analogs SIMP J01365662+0933473 and 2MASS J21392676+0220226 using the Brewster retrieval framework.
Johanna M. Vos   +14 more
doaj   +3 more sources

Variability of Known Exoplanet Host Stars Observed by TESS [PDF]

open access: yesThe Astronomical Journal, 2023
Both direct and indirect methods of exoplanet detection rely upon detailed knowledge of the potential host stars. Such stellar characterization allows for accurate extraction of planetary properties, as well as contributing to our overall understanding ...
Emilie R. Simpson   +5 more
doaj   +2 more sources

A qualitative assessment of limits of active flight in low density atmospheres [PDF]

open access: yesScientific Reports
Exoplanet atmospheres are expected to vary significantly in thickness and chemical composition, leading to a continuum of differences in surface pressure and atmospheric density.
Mihkel Pajusalu   +3 more
doaj   +2 more sources

Extreme Weather Variability on Hot Rocky Exoplanet 55 Cancri e Explained by Magma Temperature–Cloud Feedback [PDF]

open access: yesProceedings of the National Academy of Sciences of the United States of America
Edwin S. Kite, Kaitlyn Loftus, Bowen Fan
exaly   +2 more sources

Traveling Planetary-scale Waves Cause Cloud Variability on Tidally Locked Aquaplanets

open access: yesThe Planetary Science Journal, 2023
Cloud cover at the planetary limb of water-rich Earth-like planets is likely to weaken chemical signatures in transmission spectra, impeding attempts to characterize these atmospheres.
Maureen Cohen   +4 more
doaj   +1 more source

Multiepoch Detections of the Extended Atmosphere and Transmission Spectra of KELT-9b with a 1.5 m Telescope

open access: yesThe Astronomical Journal, 2023
Irradiated Jovian atmospheres are complex and dynamic and can undergo temporal variations due to the close proximity of their parent stars. Of the Jovian planets that have been cataloged to date, KELT-9b is the hottest gas giant known, with an ...
Nataliea Lowson   +12 more
doaj   +1 more source

The Variable Detection of Atmospheric Escape around the Young, Hot Neptune AU Mic b

open access: yesThe Astronomical Journal, 2023
Photoevaporation is a potential explanation for several features within exoplanet demographics. Atmospheric escape observed in young Neptune-sized exoplanets can provide insight into and characterize which mechanisms drive this evolution and at what ...
Keighley E. Rockcliffe   +7 more
doaj   +1 more source

General Circulation Model Constraints on the Detectability of the CO2-CH4 Biosignature Pair on TRAPPIST-1e with JWST

open access: yesThe Astrophysical Journal Letters, 2022
Terrestrial exoplanets such as TRAPPIST-1e will be observed in a new capacity with the JWST/Near Infrared Spectrograph (NIRSpec), which is expected to be able to detect CO _2 , CH _4 , and O _2 signals, if present, with multiple coadded transit ...
Yoav Rotman   +4 more
doaj   +1 more source

Magnetohydrodynamical Torsional Oscillations from Thermoresistive Instability in Hot Jupiters

open access: yesThe Astrophysical Journal, 2023
Hot Jupiter atmospheres may be subject to a thermoresistive instability where an increase in the electrical conductivity due to ohmic heating results in runaway of the atmospheric temperature.
Raphaël Hardy   +2 more
doaj   +1 more source

A Blind Search for Transit Depth Variability with TESS

open access: yesThe Astronomical Journal, 2023
The phenomenon of transit depth variability offers a pathway through which processes such as exoplanet atmospheric activity and orbital dynamics can be studied.
Gavin Wang, Néstor Espinoza
doaj   +1 more source

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