In:
Journal of Geophysical Research: Space Physics, American Geophysical Union (AGU), Vol. 113, No. A10 ( 2008-10)
Abstract:
The solar vacuum ultraviolet (VUV; 〈 200 nm) radiation induces photoemission from the surface of the Moon, Mercury, and other airless celestial bodies. This process charges the surface positively and generates a near‐surface photoelectron plasma sheath. Solar activity is highly variable in the 70–100 nm range where the photoelectron yield peaks. Available data for high‐resolution solar UV spectra and lunar grain photoelectric yield are combined to calculate the variation of photoelectron emission with solar activity. The results show that extreme solar flare conditions can increase photoelectron emission several fold. The consequence of higher photoelectron current is increased surface potential and stronger electric field that is likely to increase the electrostatic mobilization of lunar dust.
Type of Medium:
Online Resource
ISSN:
0148-0227
DOI:
10.1029/2008JA013487
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
2008
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