Results 71 to 80 of about 3,181,123 (208)
A New Set of Atmosphere and Evolution Models for Brown Dwarfs and Giant Exoplanets
, 2019 The study of brown dwarfs and giant exoplanets is rapidly evolving as ever-improving instrumentation becomes sensitive to cooler objects. Accurate and reliable atmosphere and evolutionary models are important for placing mass and age constraints on these newly discovered objects, and understanding the rich chemistry and physics taking place in their ...
Mark W Phillips +3 more
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On the Dual Nature of Atmospheric Escape
The Astrophysical JournalPlanetary atmospheres cannot remain hydrostatic at all altitudes because they approach finite density at infinite radius, implying infinite mass. Classical treatments address this in two directions: either retain a hydrostatic structure while allowing ...
Darius Modirrousta-Galian, Jun Korenaga
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract Mercury experiences the most intense and variable solar wind (SW) conditions in the solar system due to its close, eccentric orbit about the Sun. In addition to variation driven by coronal source and solar cycle, the SW arriving at Mercury varies periodically as the planet's heliocentric distance changes by over 50% per orbit.
Ryan M. Dewey +17 more
wiley +1 more source
The Astrophysical JournalThroughout their lives, short-period exoplanets (
Madelyn I. Broome +3 more
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Effects of Hot Oxygen Corona on Ion Escape From Venus‐Like Planets
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Due to the lack of a significant planetary magnetic field, the upper atmospheres of Venus‐like planets interact directly with the stellar wind. Therefore, thermal atomic oxygen in the thermosphere and hot oxygen in the corona produced by non‐thermal processes in the upper atmosphere act as a source of ion pickup loss.
T. Nishioka +6 more
wiley +1 more source
The Astrophysical Journal LettersThe recent discovery of “ultrahot” ( P < 1 day) Neptunes has come as a surprise: some of these planets have managed to retain gaseous envelopes despite being close enough to their host stars to trigger strong photoevaporation and/or Roche lobe overflow ...
Shreyas Vissapragada +18 more
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Predicting Nitrogen Isotope Fractionation in Nitrate Deposition on Early Mars
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Noachian and early Hesperian Mars were likely warm and wet, with an atmosphere abundant in molecular nitrogen. The recent discovery of nitrate deposits in the Yellowknife Bay mudstones at Gale Crater confirm the existence of nitrogen oxides (NOX) on Noachian Mars. The processes responsible for the production of these nitrates would fractionate
J. Shawcross +4 more
wiley +1 more source
Metal-enriched Atmospheres in Warm (Super- and Sub-) Neptunes Induced by Extreme Atmospheric Escape
The Astrophysical JournalPlanet formation impacts exoplanet atmospheres by accreting metals in solid form, leading to atmospheric carbon-to-oxygen ratios (C/O) and sulfur-to-nitrogen ratios (S/N) that deviate from those of their host stars. Recent observations indicate differing
Amy J. Louca, Yamila Miguel
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On the Detection of Low‐Frequency Planetary Radio Emission With an Orbiting Interferometer
Radio Science, Volume 61, Issue 6, June 2026.Abstract The magnetized planets of the outer Solar System produce kilometric radio emissions at very low frequencies (<1 ${< } 1\,$MHz). They reveal the planetary magnetic dynamics and their interaction with the solar wind. Those radio emissions can also serve as a proxy for interplanetary space weather monitoring.
E. Rouillé +4 more
wiley +1 more source
Evolution of Atmospheric Composition in Giant Exoplanets with Diluted Cores
Transmission spectroscopy has reported sub-solar C/O ratios (
Matsuo, Hiroki +2 more
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