Results 51 to 60 of about 193,103 (196)
Hydrogen dominated atmospheres on terrestrial mass planets: evidence, origin and evolution [PDF]
, 2020 The discovery of thousands of highly irradiated, low-mass, exoplanets has led to the idea that atmospheric escape is an important process that can drive their evolution. Of particular interest is the inference from recent exoplanet detections that there is a large population of low mass planets possessing significant, hydrogen dominated atmospheres ...
arxiv +1 more source
Stellar Driven Evolution of Hydrogen-Dominated Atmospheres from Earth-Like to Super-Earth-Type Exoplanets [PDF]
, 2014 Originally published by: Springer International Publishing Switzerland 2015 H. Lammer, M. Khodachenko (eds.), Characterizing Stellar and Exoplanetary Environments, Astrophysics and Space Science Library ...
Mats Holmström +3 more
openaire +4 more sources
The role of boundary‐layer friction in modulating midlatitude heatwaves
Quarterly Journal of the Royal Meteorological Society, EarlyView.Boundary‐layer friction associated with different surface types plays an important role in modulating heatwaves in the midlatitudes. The main changes in heatwave features occur when locally modifying boundary‐layer friction along the jet‐stream axis. Real‐world differences in the occurrence of heatwaves between different locations in the midlatitudes ...
E. Russo +3 more
wiley +1 more source
The Astronomical JournalTOI-836 is a ∼2–3 Gyr K dwarf with an inner super Earth ( R = 1.7 R _⊕ , P = 3.8 days) and an outer mini-Neptune ( R = 2.6 R _⊕ , P = 8.6 days). JWST/NIRSpec 2.8–5.2 μ m transmission spectra are flat for both planets.
Michael Zhang +15 more
doaj +1 more source
Warm giant exoplanet characterisation: current state, challenges and outlook
Frontiers in Astronomy and Space Sciences, 2023 The characterisation of giant exoplanets is crucial to constrain giant planet formation and evolution theory and for putting the solar-system’s giant planets in perspective. Typically, mass-radius (M-R) measurements of moderately irradiated warm Jupiters
Simon Müller, Ravit Helled
doaj +1 more source
Strong Fractionation of Deuterium and Helium in Sub-Neptune Atmospheres along the Radius Valley
The Astrophysical JournalWe simulate atmospheric fractionation in escaping planetary atmospheres using IsoFATE , a new open-source numerical model. We expand the parameter space studied previously to planets with tenuous atmospheres that exhibit the greatest helium and deuterium
Collin Cherubim +3 more
doaj +1 more source
Variability of Known Exoplanet Host Stars Observed by TESS
The 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 +1 more source
The Astronomical Journal, 2023 X-ray through infrared spectral energy distributions (SEDs) are essential for understanding a star’s effect on exoplanet atmospheric composition and evolution. We present a catalog of panchromatic SEDs, hosted on the Barbara A. Mikulski Archive for Space
Patrick R. Behr +10 more
doaj +1 more source
Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.Abstract Significant volcanic activity continued for billions of years since 3.5–4 Gyr ago in the Procellarum KREEP Terrane (PKT) of the Moon, but not so significant outside the PKT. To understand this volcanic history, we developed a 2‐D numerical model of magmatism and mantle convection; the effects of the PKT on lunar evolution are considered by ...
Ken'yo U +4 more
wiley +1 more source
Decomposition of Benzene during Impacts in N2-dominated Atmospheres
The Astrophysical Journal, 2023 Benzene is a simple neutral aromatic compound found in molecular clouds, comets, and planetary atmospheres. It has been confirmed on Jupiter, Saturn, Titan, and is expected on exoplanets.
Lukáš Petera +3 more
doaj +1 more source