Results 51 to 60 of about 1,980 (216)
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract We present large‐scale simulations of energetic neutral atom (ENA) emissions at Uranus from a spacecraft viewpoint. Models of magnetic field, extended hydrogen exosphere, moon‐sourced neutral tori, and proton radiation belt are implemented into a simulator to evaluate the production of ENAs for L $L$ = 1–15.
D. Santos‐Costa, N. André
wiley +1 more source
Limits on the Density of the Lunar Ionosphere: ARTEMIS Observations
The Astrophysical Journal, 2023 The Moon of our Earth has a tenuous atmosphere, known as an exosphere. The ionization of this exosphere is speculated to possibly form a weak ionosphere.
Han-Wen Shen +2 more
doaj +1 more source
Temporal Variability of Saturn's H2 Dayglow and Northern Aurora Observed by Hisaki and Cassini
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Ultraviolet (UV) emissions from molecular hydrogen in Saturn's atmosphere consist of bright auroral emission over the poles and disk‐wide airglow. The dayside disk emits substantial intensities (dayglow) previously detected by various instruments.
L. S. Clare +14 more
wiley +1 more source
Frontiers in Astronomy and Space SciencesRemote sensing observations of far-ultraviolet (FUV) emissions have been used to estimate 3D neutral hydrogen (H) density models of the terrestrial exosphere under solar minimum (2008) and solar maximum (2013 and 2015) conditions.
Jochen H. Zoennchen +4 more
doaj +1 more source
Reinvestigating the Nightside Ionosphere of Mars With 8 Years of Mars Express and MAVEN Data
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Tailward ion escape in the nightside magnetotail is one of the dominant paths of ion escape from Mars. The Martian nightside ionosphere can serve as a major reservoir for this escape channel, but its global distributions and dependence on the upstream solar wind have not been fully investigated due to observational limitations.
N. Takeuchi +2 more
wiley +1 more source
Influence of subsurface diffusion on Mercury's Sodium exosphere
, 2023 International audienceIn the 1970's, Mariner 10 preformed the first measurement of the surface bounded exosphere, composed of hydrogen, helium and oxygen of Mercury.
Verkercke, Sébastien +2 more
core +1 more source
Sodium Enrichment of Mercury's Subsurface Through Diffusion
Geophysical Research LettersMercury's surface undergoes large temperature gradients between day and night, which repeats periodically over the same longitudes due to its 3:2 spin‐orbit resonance.
S. Verkercke +5 more
doaj +1 more source
Variability of Earth’s ionospheric outflow in response to the dynamic terrestrial exosphere
Frontiers in Astronomy and Space SciencesThe most abundant neutral constituent in the exospheric region (i.e., beyond ≈ 500 km altitude) is the atomic hydrogen (H); however, its density distributions predicted by physics-based models have been challenged by satellite-based observations of its ...
Mei-Yun Lin +6 more
doaj +1 more source
Effects of Comet Encke's Meteoroid Stream on the Seasonal Variation of Mercury's Ca Exosphere
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Mercury's calcium (Ca) exosphere, observed by NASA's MESSENGER mission, exhibits high temperatures (>50000 K) and pronounced seasonal variability, with its source mainly on the dawn side. Enhanced Ca emission near True Anomaly Angle (TAA) ∼25° and ∼150° has been attributed to Comet 2P/Encke meteoroid streams.
M. Moroni +18 more
wiley +1 more source
3D-modeling of Callisto’s sputtered surface-exosphere environment [PDF]
, 2016 We study the stoichiometrical release of various surface elements caused by plasma sputtering from an assumed icy and non-icy (i.e. chondritic) surface into the exosphere of the Jovian satellite Callisto. We apply a 3D plasma planetary interaction hybrid
Lindqvist, Jesper +7 more
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