IGPP Seminar Series

The solar wind - Moon interaction observed by MAP (MAgnetic field and Plasma experiment) on Kaguya (SELENE)

by Dr. Yoshifumi Saito
ISAS, Japan

Abstract

MAP-PACE (MAgnetic field and Plasma experiment - Plasma energy Angle and Composition Experiment) on Kaguya (SELENE) completed its /~/1.5-year observation of the low energy charged particles around the Moon. The newly observed data show characteristic ion distributions around the Moon. Besides the solar wind, low energy ion analyzers have discovered four clearly distinguishable ion distributions in the dayside of the Moon: 1) Solar wind ions reflected / scattered at the lunar surface, 2) Solar wind ions reflected by magnetic anomalies on the lunar surface, 3) Ions that are originating from the solar wind ions reflected / scattered at the lunar surface and are pick-up accelerated by the solar wind convection electric field, and 4) Ions originating from the lunar surface / lunar atmosphere. Though the detailed process of the reflection / scattering is yet to be understood, solar wind ions reflected / scattered at the lunar surface probably involve the information about the lunar surface while the ions originating from the lunar surface / lunar atmosphere probably reflect the lunar surface composition. The solar wind - Moon interaction newly observed by MAP-PACE including the ion data obtained at low altitude of ~50km and ~10km will be presented.
Tuesday, 06 October 2009
3853 Slichter Hall
Refreshments at 3:45 PM
Lecture at 4:00 PM