Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1147r&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1147
Physics
Scientific paper
We present quantitative results of observations of energetic neutral atoms (ENAs) originating from the lunar surface. These ENAs, which are hydrogen atoms, are the result of the solar wind protons being reflected from and neutralised at the surface of the Moon. These measurements were made with IBEX-Lo on NASA's IBEX satellite. From these measurements we derive the energy spectrum of the ENAs, their flux, and the lunar albedo for ENAs (i.e., the ratio of ENAs to the incoming solar wind protons). From several orbits we derived an average global albedo of AH = 0.09±0.05. The observed energy spectrum provides a generic spectrum for unshielded bodies in the solar wind. This spectrum clearly shows that the origin of the ENAs is directly from the solar wind via backscattering, and that they are not sputtered atoms.
Funsten Herbert O.
Fuselier Stephen A.
McComas David John
Möbius Eberhard
Rodriguez D. F.
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