Fermi I electron acceleration by magnetic reconnection exhausts on closely stacked current sheets near the heliopause

Details Fermi I electron acceleration by magnetic reconnection exhausts on closely stacked current sheets near the heliopause Fermi I electron acceleration by magnetic reconnection exhausts on closely stacked current sheets near the heliopause

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1216..588c&link_type=abstract

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings, Volume 1216, pp. 588-591 (2010).

Computer Science

1

Magnetic Field Effects, Solar Wind, Spacecraft, Magnetohydrodynamic Waves, Shock Waves, Magnetic Reconnection, Particle Emission, Solar Wind, Spacecraft/Atmosphere Interactions, Magnetohydrodynamics And Plasmas, Planetary Bow Shocks, Interplanetary Shocks

Scientific paper

Recent observations (up to 32 AU) of solar wind reconnection exhausts suggest fairly frequent occurrence of such events on current sheets associated with the ICME fronts and on the heliospheric current sheet (HCS). Comparison of relevant plasma β values and magnetic field strengths with conditions in the heliosheath indicates that reconnection may also take place in the heliosheath, especially towards the heliopause where the folds of HCS are expected to be pressed together by the slowing of solar plasma flow. We propose a Fermi I type acceleration mechanism in which particles gain energy by random collisions reconnection exhausts expanding typically with local Alfven speed. The most probable place for this process is a (several wide) region of tightly folded HCS near the nose of heliopause. The process may in particular provide the mechanism of accelerating the electrons needed for generation of 2-3 kHz heliospheric emissions.

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