Results 11 to 20 of about 141,901 (265)
Atmospheric Escape from Hot Jupiters [PDF]
Astronomy & Astrophysics, 2004 The extra-solar planet HD209458b has been found to have an extended atmosphere of escaping atomic hydrogen (Vidal-Madjar et al. 2003), suggesting that ``hot Jupiters'' closer to their parent stars could evaporate. Here we estimate the atmospheric escape (
Etangs, A. Lecavelier des +3 more
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ATMOSPHERIC ESCAPE FROM HOT JUPITERS [PDF]
The Astrophysical Journal, 2009 Accepted for publication in ApJ, 22 pages, 24 figures. Added additional references--in particular, we now discuss charge-exchange as a potential source of high-velocity ...
Murray-Clay, Ruth +2 more
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Atmospheric Escape Processes and Planetary Atmospheric Evolution [PDF]
Journal of Geophysical Research: Space Physics, 2020 Abstract The habitability of the surface of any planet is determined by a complex evolution of its interior, surface, and atmosphere. The electromagnetic and particle radiation of stars drive thermal, chemical, and physical alteration of planetary atmospheres, including escape. Many known extrasolar planets experience vastly different
G. Gronoff +19 more
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Modeling magnesium escape from HD 209458b atmosphere [PDF]
Astronomy & Astrophysics, 2014 Transit observations in the MgI line of HD209458b revealed signatures of neutral magnesium escaping the upper atmosphere of the planet, while no atmospheric absorption was found in the MgII doublet. Here we present a 3D particle model of the dynamics of neutral and ionized magnesium populations, coupled with an analytical modeling of the atmosphere ...
Bourrier, V. +2 more
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THERMALLY DRIVEN ATMOSPHERIC ESCAPE [PDF]
The Astrophysical Journal, 2010 Accurately determining escape rates from a planet's atmosphere is critical for determining its evolution. Escape can be driven by upward thermal conduction of energy deposited well below the exobase, as well as by non-thermal processes produced by energy deposited in the exobase region. Recent applications of a model for escape driven by upward thermal
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THERMALLY DRIVEN ATMOSPHERIC ESCAPE: TRANSITION FROM HYDRODYNAMIC TO JEANS ESCAPE [PDF]
The Astrophysical Journal, 2011 16 pages,5 ...
Volkov, Alexey N. +3 more
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Constraining atmospheric escape rates
, 2022 Atmospheric escape is believed to significantly influence the evolution of close-in exoplanets, and has been proposed to shape planetary demographics in the form of the hot Neptune desert and evaporation valley. In order to test these theories, it is crucial to obtain accurate estimates of the atmospheric mass-loss rate for evaporating exoplanets ...
D.C. Linssen, A. Oklopčić, M. MacLeod
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Molecular-Kinetic Simulations of Escape from the Ex-planet and Exoplanets: Criterion for Transonic Flow [PDF]
, 2013 The equations of gas dynamics are extensively used to describe atmospheric loss from solar system bodies and exoplanets even though the boundary conditions at infinity are not uniquely defined. Using molecular-kinetic simulations that correctly treat the
Erwin, Justin T. +2 more
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Detection of Atmospheric Escape from Four Young Mini-Neptunes
The Astronomical Journal, 2023 We use Keck/NIRSPEC to survey a sample of of young (
Michael Zhang +7 more
doaj +1 more source
Atmospheric Mass Loss During Planet Formation: The Importance of Planetesimal Impacts [PDF]
, 2014 We quantify the atmospheric mass loss during planet formation by examining the contributions to atmospheric loss from both giant impacts and planetesimal accretion. Giant impacts cause global motion of the ground.
Sari, Re'em +2 more
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