Unified Simulations of Planetary Formation and Atmospheric Evolution. II. Rapid Disk Clearing by Photoevaporation Yields Low-mass Super-Earth Atmospheres [PDF]
Astrophysical Journal, 2020 Super-Earths possess low-mass H2/He atmospheres (typically less than 10% by mass). However, the origins of super-Earth atmospheres have not yet been ascertained.
M. Ogihara, M. Kunitomo, Y. Hori
semanticscholar +1 more source
Perspectives on Atmospheric Evolution from Noble Gas and Nitrogen Isotopes on Earth, Mars & Venus [PDF]
, 2020 The composition of an atmosphere has integrated the geological history of the entire planetary body. However, the long-term evolutions of the atmospheres of the terrestrial planets are not well documented.
G. Avice, B. Marty
semanticscholar +1 more source
Scientific Reports, 2023 While population declines among Adélie penguins and population increases among gentoo penguins on the Western Antarctic Peninsula are well established, the logistical challenges of operating in the sea ice-heavy northern tip of the Antarctic Peninsula ...
Michael Wethington +3 more
doaj +1 more source
Evolution of Mercury’s Earliest Atmosphere
The Planetary Science Journal, 2021 Abstract MESSENGER observations suggest a magma ocean formed on proto-Mercury, during which evaporation of metals and outgassing of C- and H-bearing volatiles produced an early atmosphere. Atmospheric escape subsequently occurred by plasma heating, photoevaporation, Jeans escape, and photoionization.
Noah Jäggi +8 more
openaire +3 more sources
Conclusive Evidence for a Population of Water Worlds around M Dwarfs Remains Elusive
The Astrophysical Journal Letters, 2023 The population of small, close-in exoplanets is bifurcated into super-Earths and sub-Neptunes. We calculate physically motivated mass–radius relations for sub-Neptunes, with rocky cores and H/He-dominated atmospheres, accounting for their thermal ...
James G. Rogers +2 more
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Reviewing Martian Atmospheric Noble Gas Measurements: From Martian Meteorites to Mars Missions
Geosciences, 2020 Martian meteorites are the only samples from Mars available for extensive studies in laboratories on Earth. Among the various unresolved science questions, the question of the Martian atmospheric composition, distribution, and evolution over geological ...
Thomas Smith +3 more
doaj +1 more source
Close-in Sub-Neptunes Reveal the Past Rotation History of Their Host Stars: Atmospheric Evolution of Planets in the HD 3167 and K2-32 Planetary Systems [PDF]
Astrophysical Journal, 2019 Planet atmospheric escape induced by high-energy stellar irradiation is a key phenomenon shaping the structure and evolution of planetary atmospheres.
D. Kubyshkina +9 more
semanticscholar +1 more source
Lyα in the GJ 1132 System: Stellar Emission and Planetary Atmospheric Evolution [PDF]
Astronomical Journal, 2019 GJ 1132b, which orbits an M dwarf, is one of the few known Earth-sized planets, and at 12 pc away it is one of the closest known transiting planets. Receiving roughly 19× Earth’s insolation, this planet is too hot to be habitable but can inform us about ...
W. Waalkes +8 more
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Evolution of Atmospheric O2 Through the Phanerozoic, Revisited
Annual Review of Earth and Planetary Science, 2023 An oxygen-rich atmosphere is essential for complex animals. The early Earth had an anoxic atmosphere, and understanding the rise and maintenance of high O2 levels is critical for investigating what drove our own evolution and for assessing the likely ...
Benjamin J. W. Mills +3 more
semanticscholar +1 more source
Scaling K2. VII. Evidence For a High Occurrence Rate of Hot Sub-Neptunes at Intermediate Ages
The Astronomical Journal, 2023 The NASA K2 mission obtained high-precision time-series photometry for four young clusters, including the near-twin 600–800 Myr old Praesepe and Hyades clusters. Hot sub-Neptunes are highly prone to mass-loss mechanisms, given their proximity to the host
Jessie L. Christiansen +8 more
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