Radio emission from mini-magnetospheres on the Moon

Details Radio emission from mini-magnetospheres on the Moon Radio emission from mini-magnetospheres on the Moon

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3111809k&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 11, CiteID L11809

Physics

Plasma Physics

2

Radio Science: Waves In Plasma, Solar Physics, Astrophysics, And Astronomy: Radio Emissions, Space Plasma Physics: Charged Particle Motion And Acceleration, Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Wave/Wave Interactions

Scientific paper

Small-scale, localized magnetic anomalies on the surface of planetary satellites effectively create ``mini-magnetospheres'', which can lead to standoff shocks analogous to planetary bow shocks. This gives rise to the tantalizing possibility that radio emission can be produced in the vicinity of such mini-magnetospheres, since it is well known that radio emissions are directly associated with the foreshock regions of planetary bow shocks and travelling interplanetary shocks. In this letter, we generalize a theoretical model for foreshock radio emissions in order to determine whether observable radio fluxes can also be generated near mini-magnetospheres. We show that, when applied specifically to the Moon, this model predicts that mini-magnetospheres should produce radio fluxes above current instrument sensitivity limits. Moreover, the predicted strong dependence of the radio emission on the upstream plasma properties may have important implications for the model's applicability to other planetary satellites.

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