Energetic particles in the solar wind and at the Sun

Details Energetic particles in the solar wind and at the Sun Energetic particles in the solar wind and at the Sun

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..385...25l&link_type=abstract

Scientific basis for robotic exploration close to the sun. AIP Conference Proceedings, Volume 385, pp. 25-40 (1997).

Astronomy and Astrophysics

Astronomy

3

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

Scientific paper

The current understanding of solar energetic particles in the interplanetary medium is reviewed, and recent observations from the Wind spacecraft presented. In impulsive events the electron energy spectrum is found to extend down in a power law to <~1 keV, implying that the source must be high, 0.2-1 Rsolar, in the corona. At solar quiet times Wind detects a continuously present ``super-halo'' component with approximately power law spectrum from ~1 keV to ~100 keV. What is known about energetic particles at Sun is summarized, and recent work on solar hard X-ray bursts observed down to ~7 keV is discussed. The energetic electrons accelerated in these frequently occurring hard x-ray microflares may contribute significantly to the heating of the active corona.

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