Results 11 to 20 of about 1,980 (216)
Constraints on the exosphere of CoRoT-7b [PDF]
Astronomy & Astrophysics, 2010 CONTEXT: The small radius and high density of CoRoT-7b implies that this transiting planet belongs to a differen t species than all transiting planets previously found. Current models suggest that this is the first transiting rocky planet found outside the solar system. Given that the planet orbits a solar-like star at a distance of on ly 4.5 R*, it is
Guenther, Eike +10 more
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Mercury's subsolar sodium exosphere: an ab initio calculation to interpret MASCS/UVVS observations from MESSENGER [PDF]
Annales Geophysicae, 2019 The optical spectroscopy measurements of sodium in Mercury's exosphere near the subsolar point by MESSENGER Mercury Atmospheric and Surface Composition Spectrometer Ultraviolet and Visible Spectrometer (MASCS/UVVS) have been interpreted before with a ...
D. Gamborino, A. Vorburger, P. Wurz
doaj +3 more sources
Density in a planetary exosphere [PDF]
Journal of Geophysical Research, 1961 A discussion of the Opik-Singer theory of the density of a planetary exosphere is presented. Their density formula permits the calculation of the depth of the exosphere. Since the correctness of their derivation of the basic formula for the density distribution has been questioned, an alternate method based directly on Liouville's theorem is given.
J. Herring, L. Kyle
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The Putative Cerean Exosphere [PDF]
The Astrophysical Journal, 2017 Abstract The ice-rich crust of dwarf planet 1 Ceres is the source of a tenuous water exosphere, and the behavior of this putative exosphere is investigated with model calculations. Outgassing water molecules seasonally condense around the winter pole in an optically thin layer. This seasonal cap reaches an estimated mass of at least
Norbert Schorghofer +9 more
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Frontiers in Astronomy and Space Sciences, 2023 This study explores the impact of the exosphere hydrogen (H) density on the ionosphere-plasmasphere system using a model whose key inputs are constrained by ionosphere observations at both ends of the magnetic field line with an L-value of 1.75 in the ...
Dmytro Kotov +18 more
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The Effect of the Thermosphere on Ionosphere Outflows
Frontiers in Astronomy and Space Sciences, 2021 The Naval Research Laboratory (NRL) Sami2 is Another Model of the Ionosphere (SAMI2) and Sami3 is Also a Model of the Ionosphere (SAMI3) ionosphere/plasmasphere codes have shown that thermosphere composition and winds significantly affect H+ outflows ...
J. Krall, J. D. Huba
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Universe, 2022 Spacecraft flybys provide access to the chemical composition of the gaseous envelope of the planetary object. Typical relative encounter velocities range from km/s to tens of km/s in flybys.
Rico G. Fausch +2 more
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Density in a Simple Model of the Exosphere [PDF]
The Physics of Fluids, 1962 The particle density of a simple model of the exosphere is obtained by solving exactly the collisionless Boltzmann equation. The main point of the solution is that it is a discontinuous, multivalued function of the constants of motion. Results, of course, agree with those of other methods based on Newtonian mechanics.
Aamodt, Richard Edward, Case, K. M.
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Magnetic Evidence for an Extended Hydrogen Exosphere at Mercury
, 2022 Remote observations by the Mariner 10 and MErcury Surface, Space ENvironment, GEophysics, and Ranging (MESSENGER) spacecraft have shown the existence of hydrogen in the exosphere of Mercury.
Narita, Y. +19 more
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3D-modeling of Mercury's solar wind sputtered surface-exosphere environment [PDF]
, 2015 The efficiency of sputtered refractory elements by H+ and He++ solar wind ions from Mercury's surface and their contribution to the exosphere are studied for various solar wind conditions.
Lichtenegger, H.I.M. +12 more
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