The Far-Ultraviolet Oxygen Airglow of Europa and Ganymede
- D. Hall, P. Feldman, M. McGrath, D. Strobel
- Physics
- 20 May 1998
Far-UV spectra of Europa and Ganymede, acquired by the Hubble Space Telescope Goddard High Resolution Spectrograph, indicate that, in addition to faintly reflected sunlight, both satellites emit O I…
Detection of an oxygen atmosphere on Jupiter's moon Europa
- D. Hall, D. Strobel, P. Feldman, M. McGrath, H. Weaver
- PhysicsNature
- 23 February 1995
The detection of atomic oxygen emission from Europa is reported, which is interpreted as being produced by the simultaneous dissociation and excitation of atmospheric O2 by electrons from Jupiter's magnetosphere.
Transient Water Vapor at Europa’s South Pole
Europa's Plumes Jupiter's moon Europa has a subsurface ocean and a relatively young icy surface, and spectral images taken by the Hubble Space Telescope show ultraviolet emissions from the moon's atmosphere that are consistent with two 200-km-high plumes of water vapor.
OH in Saturn's magnetosphere: Observations and implications
- J. Richardson, A. Eviatar, M. McGrath, V. Vasyliūnas
- Physics, Geology
- 30 August 1998
The discovery of OH in Saturn's inner magnetosphere changed our view of this region from one where plasma dominated the physics to one where neutrals are dominant. We revisit Hubble Space Telescope…
HST/STIS Ultraviolet Imaging of Polar Aurora on Ganymede
- P. Feldman, M. McGrath, D. Strobel, H. Moos, K. Retherford, B. Wolven
- Physics
- 31 March 2000
We report new observations of the spectrum of Ganymede in the spectral range 1160-1720 Å made with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST) on 1998 October…
Sputtering of sodium on the planet Mercury
- M. McGrath, R. E. Johnson, L. Lanzerotti
- PhysicsNature
- 23 October 1986
The discovery of a column density of neutral sodium vapour (∼1011–1012 atoms Na cm−2) associated with the solar-facing side of the planet Mercury1 has rekindled interest in the possible presence of…
PROBING FOR EVIDENCE OF PLUMES ON EUROPA WITH HST/STIS
- W. Sparks, K. Hand, M. McGrath, E. Bergeron, M. Cracraft, S. Deustua
- Physics, Geology
- 26 September 2016
Roth et al. () reported evidence for plumes of water venting from a southern high latitude region on Europa: spectroscopic detection of off-limb line emission from the dissociation products of water.…
Transient Water Vapor at Europa's
In November and December 2012, the Hubble Space Telescope (HST) imaged Europa’s ultravioletemissions in the search for vapor plume activity. We report statistically significant coincidentsurpluses of…
Exospheres and Atmospheric Escape
- R. E. Johnson, M. Combi, J. Waite
- Physics
- 20 August 2008
Aeronomy is a description of the physics and chemistry of the upper atmospheres and ionospheres of planetary bodies. In this chapter we consider those processes occurring in the upper atmosphere that…
Io's dayside SO2 atmosphere
- L. Feaga, M. McGrath, P. Feldman
- Physics, Environmental Science
- 1 June 2009
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