How Common is Energetic 3He in the Inner Heliosphere?

Details How Common is Energetic 3He in the Inner Heliosphere? How Common is Energetic 3He in the Inner Heliosphere?

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..679..652w&link_type=abstract

SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP Conference Proceedings, Volume 679, pp. 652-6

Computer Science

9

Particle Emission, Solar Wind, Solar Wind Plasma, Sources Of Solar Wind

Scientific paper

Using data from the SIS and ULEIS instruments on the Advanced Composition Explorer (ACE) we have identified periods during which energetic 3He is present in near-Earth interplanetary space between November 1997 and May 2002. The data, which cover the energy intervals 0.2-1 MeV/nuc (ULEIS) and 4.5-16.3 MeV/nuc (SIS), show that 3He is present a significant fraction of the time, as would be required if these suprathermal particles were the major source of the 3He being accelerated by shocks in the interplanetary medium. Specifically, we find that energetic 3He is present at least ~ 60% of the time, and perhaps significantly more often.

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