Solar electron events from 1995 to 2005 with WIND/3DP Virtual Observatory Resource

Authors
  1. Wang L.
  2. Lin R.P.
  3. Krucker S.
  4. Mason G.M.
  5. Published by
    CDS
Abstract

We survey the statistical properties of 1191 solar electron events observed by the WIND 3DP instrument from <1keV to >~300keV for a solar cycle (1995 through 2005). After taking into account times of high background, the corrected occurrence frequency of solar electron events versus peak flux exhibits a power-law distribution over three orders of magnitude with exponents between -1.0 and -1.6 for different years, comparable to the frequency distribution of solar proton events, microflares, and coronal mass ejections (CMEs), but significantly flatter than that of soft X-ray (SXR) flares. At 40keV (2.8keV), the integrated occurrence rate above ~0.29 (~330)/cm2/s.sr^-1^/keV near 1 AU is ~1000/year (~600/year) at solar maximum and ~35/year (~25/year) at solar minimum, about an order of magnitude larger than the observed occurrence rate. We find these events typically extend over ~45{deg} in longitude, implying the occurrence rate over the whole Sun is ~10^4^/year near solar maximum. The observed solar electron events have a 98.75% association with type III radio bursts, suggesting all type III bursts may be associated with a solar electron event. They have a close (~76%) association with the presence of low-energy (~0.02-2MeV/nucleon), ^3^He-rich (^3^He/^4^He>=0.01) ion emissions measured by the ACE ULEIS instrument. For these electron events, only ~35% are associated with a reported GOES SXR flare, but ~60% appear to be associated with a CME, with ~50% of these CMEs being narrow. These electrons are often detected down to below 1keV, indicating a source high in the corona.

Keywords
  1. the-sun
  2. stellar-flares
Bibliographic source Bibcode
2012ApJ...759...69W
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/759/69
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/759/69
Document Object Identifer DOI
doi:10.26093/cds/vizier.17590069

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History

2014-08-13T15:26:56Z
Resource record created
2014-08-13T15:26:56Z
Created
2014-08-29T14:30:19Z
Updated

Contact

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