The Effects of Solar Energetic Particle Events on the Lunar Plasma Environment

Details The Effects of Solar Energetic Particle Events on the Lunar Plasma Environment The Effects of Solar Energetic Particle Events on the Lunar Plasma Environment

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p31b1389h&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P31B-1389

Other

2780 Solar Wind Interactions With Unmagnetized Bodies, 5421 Interactions With Particles And Fields, 5440 Magnetic Fields And Magnetism, 6250 Moon (1221), 7514 Energetic Particles (2114)

Scientific paper

Solar energetic particle (SEP) events and the associated extremes in solar wind plasma conditions, magnetic fields, and energetic particle fluxes have significant effects on the local plasma environments at the Earth, other planets, and their moons. The Moon, which lacks a significant atmosphere or global magnetic field, lies fully exposed to the effects of these solar inputs. Previous investigations have demonstrated the direct coupling between solar drivers and the lunar plasma environment, revealing that increased energetic particle fluxes associated with SEP events act to charge the shadowed lunar surface to negative potentials as high as several kilovolts. In this presentation we explore the effects of large SEP events and other disturbances on the lunar plasma environment by comparing Lunar Prospector data during selected events with data from quiet times. We further consider the influence of SEP events on lunar surface charging, and investigate their effects on the structure of the lunar plasma wake. We also examine the impact of solar events on all aspects of the lunar magnetic field environment, including quasi-steady magnetic field structures associated with the wake and transient structures produced by local interactions with crustal magnetic fields.

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