Physics
Scientific paper
Jan 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007esasp.643..171c&link_type=abstract
Workshop on Dust in Planetary Systems (ESA SP-643). September 26-30 2005, Kauai, Hawaii. Editors: Krueger, H. and Graps, A., p.1
Physics
Scientific paper
Dust particles in the regoliths of planetary satellites, asteroids, and ring particles can become charged due to photoemission from solar ultraviolet photons, solar wind currents, and, in some cases, magnetospheric electrons. A surface potential is created on the surface of airless bodies in the solar system, such as the Moon, due to these same currents. This leads to a plasma sheath over the nighttime surface and a photoelectron layer over the daytime surface. Charged dust particles injected into this near-surface plasma environment are affected by the electrostatic force as well as gravity. This can lead to transport of dust and levitation of particles above the surface. Lunar electrostatic dust dynamics have been proposed for several observed dust phenomena [1-6]. Similar phenomena may play a role in the spokes of Saturn's rings [7, 8] and in the formation of smooth deposits in the floors of some craters on the asteroid Eros as observed by the NEAR-Shoemaker spacecraft [9].
Colwell Joshua E.
Haugsjaa A.
Horanyi Mihaly
Robertson Scott
Wang Xinhua
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