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Rosetta-Alice Observations of Exospheric Hydrogen and Oxygen on Mars
Paul D. Feldman, Andrew J. Steffl, Joel Wm. Parker +9
The European Space Agency's Rosetta spacecraft, en route to a 2014 encounter with comet 67P/Churyumov-Gerasimenko, made a gravity assist swing-by of Mars on 25 February 2007, close…
HST/ACS Observations of Europa's Atmospheric UV Emission at Eastern Elongation
Joachim Saur, Paul D. Feldman, Lorenz Roth +7
We report results of a Hubble Space Telescope (HST) campaign with the Advanced Camera for Surveys to observe Europa at eastern elongation, i.e. Europa's leading side, on 2008 June…
The Carbon Monoxide Abundance in Comet 103P/Hartley during the EPOXI Flyby
H. A. Weaver, P. D. Feldman, M. F. A'Hearn +2
We report the detection of several emission bands in the CO Fourth Positive Group from comet 103P/Hartley during ultraviolet spectroscopic observations from the Hubble Space Telesc…
Observations and modeling of H_2 fluorescence with partial frequency redistribution in giant planet atmospheres
Roxana E. Lupu, Paul D. Feldman, Stephan R. McCandliss +1
Partial frequency redistribution (PRD), describing the formation of the line profile, has negligible observational effects for optical depths smaller than ~10^3, at the resolving p…