Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..827c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 15, 1984, p. 827-838.
Astronomy and Astrophysics
Astrophysics
44
Abundance, Energetic Particles, Solar Cosmic Rays, Solar Flares, Solar Wind, Energy Spectra, Histograms, Photosphere, Solar Corona, Voyager 1 Spacecraft, Voyager 2 Spacecraft
Scientific paper
The Low Energy Telescopes on the Voyager spacecraft have been used to measure the elemental composition (Z = 2-28) and energy spectra (5-15 MeV per nucleon) of solar energetic particles (SEPs) in seven large flare events. Four flare events were selected which have SEP abundance ratios approximately independent of energy per nucleon. For these selected flare events, SEP composition results may be described by an average composition plus a systematic flare-to-flare deviation about the average. The four-flare average SEP composition is systematically different from the solar composition determined by photospheric spectroscopy. These systematic composition differences are apparently not due to SEP propagation or acceleration effects. In contrast, the four-flare average SEP composition is in agreement with measured solar wind abundances and with a number of recent spectroscopic coronal abundance measurements. These findings suggest that SEPs originate in the corona, and that both SEPs and the solar wind sample a coronal composition which is significantly and persistently different from that measured for the photosphere.
Cook Walter R.
Stone Edward C.
Vogt Rochus E.
No associations
LandOfFree
Elemental composition of solar energetic particles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Elemental composition of solar energetic particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elemental composition of solar energetic particles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1498739