Inferred charge states of high energy solar particles from the solar isotope spectrometer on ACE
Abstract
The large solar event on November 6, 1997, was enriched in heavy elements (Fe/O ∼ 1) with very hard energy spectra (power law index of -2). There was also a large enrichment in heavier isotopes, suggesting unusually strong charge to mass (Q/M) fractionation (∼(Q/M)-7). Assuming that the fractionation is dominated by Q/M and first ionization potential (FIP) related processes, we have inferred the charge states of twelve elements with energies of 12-60 MeV/nucleon. These results suggest a source temperature of 3-6 × 106K, significantly higher than deduced at lower energies.
- Publication:
-
Geophysical Research Letters
- Pub Date:
- January 1999
- DOI:
- 10.1029/1998GL900218
- Bibcode:
- 1999GeoRL..26..149C
- Keywords:
-
- Interplanetary Physics: Energetic particles;
- solar;
- Solar Physics;
- Astrophysics;
- and Astronomy: Corona;
- Solar Physics;
- Astrophysics;
- and Astronomy: Flares;
- Solar Physics;
- Astrophysics;
- and Astronomy