Results 111 to 120 of about 3,181,123 (208)
Not All Sub-Neptune Exoplanets Have Magma Oceans
The Astrophysical Journal LettersThe evolution and structure of sub-Neptunes may be strongly influenced by interactions between the outer gaseous envelope of the planet and a surface magma ocean.
Bodie Breza +2 more
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The Astronomical JournalAtmospheric mass loss is thought to induce the bimodality in the small planet population as we observe it today. Observationally, active mass loss can be traced by excess absorption in spectral lines of lighter species, such as the hydrogen Ly α line and
Ava Morrissey +8 more
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The Orbital Imperative: Charting Cosmic Evolution from Gamma-Ray Bursts to Exoplanet Atmospheres
This paper explores the intricate connection between early universe energetic phenomena, specifically Gamma-Ray Bursts (GRBs), and the later-stage evolution of planetary systems, as evidenced by exoplanet atmospheres. We propose an "orbital imperative" framework, suggesting that gravitational dynamics and the resulting distribution of matter play a ...
Revista, Zen, ASTRO, 10
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The impact of stellar activity evolution on atmospheric mass loss of young exoplanets
The increasing number of known exoplanets raises questions about their demographics and the mechanisms that shape planets into how we observe them today. Young planets in close-in orbits are exposed to harsh environments due to the host star being magnetically highly active, which results in high X-ray and extreme UV fluxes impinging on the planet ...
openaire +2 more sources
An Oxidation Gradient Straddling the Small Planet Radius Valley
The Astrophysical JournalWe present a population-level view of volatile gas species (H _2 , He, H _2 O, O _2 , CO, CO _2 , CH _4 ) distribution during the sub-Neptune to rocky planet transition, revealing in detail the dynamic nature of small planet atmospheric compositions. Our
Collin Cherubim +5 more
doaj +1 more source
A Large and Variable Leading Tail of Helium in a Hot Saturn Undergoing Runaway Inflation
The Astronomical JournalAtmospheric escape shapes the fate of exoplanets, with statistical evidence for transformative mass loss imprinted across the mass–radius–insolation distribution.
Michael Gully-Santiago +16 more
doaj +1 more source
Effects of Ultraviolet Radiation on Sub-Neptune Exoplanet Hazes through Laboratory Experiments
The Planetary Science JournalTemperate sub-Neptune exoplanets could contain large inventories of water in various phases, such as water worlds with water-rich atmospheres or even oceans.
Lori Huseby +11 more
doaj +1 more source
The Solubility of N2 in High-pressure Ice and Its Consequent Outgassing Limitations in Water Worlds
The Astrophysical JournalExoplanets with a few percent water mass fraction may host a high-pressure ice layer that separates the atmosphere from the interior. We investigate the role played by this layer in the transport of N _2 between the interior and the atmosphere.
Amit Levi +3 more
doaj +1 more source
exoplanet-dev/jaxoplanet: Astronomical time series analysis with JAX
<h2>What's Changed</h2> <ul> <li>Updating and applying pre-commit by @dfm in https://github.com/exoplanet-dev/jaxoplanet/pull/16</li> <li>Adding interface for arbitrary order limb darkening by @dfm in https://github ...
Degen, David +6 more
core +1 more source
The evolution and diversity of rocky planets: From the core to the atmosphere, from the Earth to exoplanetsidentifier:oai:t2r2.star.titech.ac.jp ...
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