A very high frequency radio interferometer for investigating ionospheric disturbances using geostationary satellites. Determination of changes in exospheric electron content by a comparison of group delay and Faraday rotation [PDF]
The theory and development of a VHF correlation radio interferometer for investigating ionospheric disturbances are discussed. The system was developed to receive signals from the geostationary Applications Technology Satellites.
Dubroff, R. E. +2 more
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Strong HI Lyman-$\alpha$ variations from the 11 Gyr-old host star Kepler-444: a planetary origin ?
, 2017 Kepler-444 provides a unique opportunity to probe the atmospheric composition and evolution of a compact system of exoplanets smaller than the Earth. Five planets transit this bright K star at close orbital distances, but they are too small for their ...
Allart, R. +10 more
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The Astrophysical JournalOur ability to understand the formation of the exospheres of airless bodies such as the Moon and Mercury has been hindered by uncertainties in how surface processes influence exospheric sources.
Liam S. Morrissey +11 more
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Quasi-exospheric heat flux of solar-wind electrons [PDF]
Density, bulk-velocity, and heat-flow moments are calculated for truncated Maxwellian distributions representing the cool and hot populations of solar-wind electrons, as realized at the base of a hypothetical exosphere.
Eviatar, A., Schultz, M.
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A Survey of Alkali Line Absorption in Exoplanetary Atmospheres
, 2011 We obtained over 90 hours of spectroscopic observations of four exoplanetary systems with the Hobby-Eberly Telescope (HET). Observations were taken in transit and out of transit, and we analyzed the differenced spectra---i.e., the transmission spectra ...
Adam G. Jensen +50 more
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Magnetospheric influence on the Moon\u27s exosphere [PDF]
, 2006 [1] Atoms in the thin lunar exosphere are liberated from the Moon\u27s regolith by some combination of sunlight, plasma, and meteorite impact. We have observed exospheric sodium, a useful tracer species, on five nights of full Moon in order to test the ...
Mendillo, M. +2 more
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The Planetary Science JournalTo better assess the role that electrons play in exosphere production on icy bodies, we measured the total and O _2 sputtering yields from H _2 O ice for electrons with energies between 0.75 and 10 keV and temperatures between 15 and 124.5 K.
Rebecca A. Carmack, Mark J. Loeffler
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Seasonal Effects of the Changing Photon Scattering Rates on Mercury’s Exospheric Structure
The Planetary Science JournalEmission in Mercury’s exosphere observed from the ground and by spacecraft is produced by resonant scattering of sunlight. The process of resonant scattering changes the structure of the exosphere owing to the transfer of momentum between the incident ...
Matthew H. Burger +5 more
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Geophysical Research LettersMercury is surrounded by a tenuous neutral exosphere composed primarily of sodium atoms, which can be continuously ionized. The production of sodium ions is concentrated on the dayside, and these ions can subsequently be transported to the magnetotail ...
Yuxi Chen, Chuanfei Dong, Weijie Sun
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A New Mechanism for Early-Time Plasmaspheric Refilling: The Role of Charge Exchange Reactions in the Transport of Energy and Mass Throughout the Ring Current-Plasmasphere System. [PDF]
J Geophys Res Space Phys, 2022 Liu J, Ilie R, Borovsky JE, Liemohn MW.
europepmc +1 more source