Expanding the inventory of spectral lines used to trace atmospheric escape in exoplanets [PDF]
Astronomy & Astrophysics, 2023 Escaping exoplanet atmospheres have been observed as deep transit signatures in a few specific spectral lines. Detections have been made in the hydrogen Ly-$\alpha$ line, the metastable helium line at 10830 {\AA} and some UV lines of metallic species ...
D. Linssen, A. Oklopvci'c
semanticscholar +1 more source
Mass Loss by Atmospheric Escape from Extremely Close-in Planets [PDF]
Astrophysical Journal, 2022 We explore atmospheric escape from close-in exoplanets with the highest mass-loss rates. First, we locate the transition from stellar X-ray and UV-driven escape to rapid Roche lobe overflow, which occurs once the 10–100 nbar pressure level in the ...
T. Koskinen +5 more
semanticscholar +1 more source
MAVEN-based investigation of Martian exobase temperatures: Diurnal and solar cycle variations
地球与行星物理论评, 2023 The exobase is a key concept for understanding atmospheric escape and evolution on Mars. With the aid of neutral density data measured via the Neutral Gas and Ion Mass Spectrometer onboard the Mars Atmosphere and Volatile Evolution spacecraft, we ...
Hao Gu +5 more
doaj +1 more source
Using Lyman-α transits to constrain models of atmospheric escape [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Lyman-α transits provide an opportunity to test models of atmospheric escape directly. However, translating observations into constraints on the properties of the escaping atmosphere is challenging.
Ethan Schreyer +3 more
semanticscholar +1 more source
Space-weather-driven Variations in Lyα Absorption Signatures of Exoplanet Atmospheric Escape: MHD Simulations and the Case of AU Mic b [PDF]
Astrophysical Journal, 2022 We simulate the space environment around AU Microscopii b and the interaction between the magnetized stellar wind and a planetary atmospheric outflow for ambient stellar wind conditions and coronal mass ejection (CME) conditions.
O. Cohen +5 more
semanticscholar +1 more source
Caught in the act: core-powered mass-loss predictions for observing atmospheric escape [PDF]
Monthly notices of the Royal Astronomical Society, 2021 Past studies have demonstrated that atmospheric escape by the core-powered mass-loss mechanism can explain a multitude of observations associated with the radius valley that separates the super-Earth and sub-Neptune planet populations.
Akash Gupta, H. Schlichting
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Quantifying the Key Factors Affecting the Escape of Planetary Atmospheres
The Astrophysical Journal, 2023 The habitability of Earth-like planets is an increasingly important subject in astrophysics and in planetary sciences. Atmospheric escape plays a vital role in the evolution of the habitability of Earth-like planets.
J. Luo, H.-Q. He, G.-S. Tong, Jiao Li
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HST PanCET program: non-detection of atmospheric escape in the warm Saturn-sized planet WASP-29 b [PDF]
Astronomy & Astrophysics, 2021 Short-period gas giant exoplanets are susceptible to intense atmospheric escape due to their large scale heights and strong high-energy irradiation.
L. D. dos Santos +12 more
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The Effects of Magnetic Fields on Observational Signatures of Atmospheric Escape in Exoplanets: Double Tail Structures [PDF]
, 2021 Using 3D radiative MHD simulations and Lyman-α transit calculations, we investigate the effect of magnetic fields on the observational signatures of atmospheric escape in exoplanets. Using the same stellar wind, we vary the planet’s dipole field strength
S. Carolan +4 more
semanticscholar +1 more source
Measuring the electric fields in space
地球与行星物理论评, 2021 Measuring electric fields in the space environments of the Earth and other planets helps us to understand the electric field structures and plasma waves in the space.
Kun Li, Jun Cui, Yong Wei
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