Properties of Impulsive Events in a Polar Coronal Hole

Abstract

Observations made at NSO/Sacramento Peak Observatory with the 16 in Coronagraph allow the analysis of fast impulsive events. Broad-band H alpha filtergrams and CCD-spectra taken at 1 to 45 arcsec above the solar chromospheric-limb are used. A deep well-developed Coronal Hole was chosen above a Polar Region, during years of minimum sunspot activity. We present a whole range of impulsive events observed there in 1988. They are tentatively analyzed using statistical methods and the results strongly suggest they could be the source of the fast wind. The recurrence of impulsive events is reported for the first time.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1990
Accession Number
ADA259974

Entities

People

  • Mohammed L. Loucif
  • Serge Koutchmy

Organizations

  • Phillips Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ejection
  • Equatorial Regions
  • High Resolution
  • Magnetic Fields
  • Materials
  • Observation
  • Observatories
  • Polar Regions
  • Radio Telescopes
  • Regions
  • Sequences
  • Solar Spectrum
  • Solar Wind
  • Spectra
  • Statistical Analysis
  • Time Intervals
  • X Rays

Fields of Study

  • Physics

Readers

  • Solar Physics