Accession Number:

ADA043182

Title:

EUV Analysis of Polar Plumes,

Descriptive Note:

Corporate Author:

HARVARD COLL OBSERVATORY CAMBRIDGE MASS CENTER FOR ASTROPHYSICS

Personal Author(s):

Report Date:

1977-08-03

Pagination or Media Count:

26.0

Abstract:

Three polar plumes were studied using Skylab Mg X and O VI data. The plumes lie within the boundaries of a polar coronal hole. The mean temperature of the plumes is about 1,100,000 and they have a small vertical temperature gradient. Densities are determined and found consistent with white light analyses. The variation of density with height in the plumes is compared with that expected for hydrostatic equilibrium. As is the case for other coronal features, polar plumes will be a source of solar wind if the magnetic field lines are open. On the basis of the derived plume model and estimates of the numbers of plumes in polar coronal holes, it appears that polar plumes contain about 15 of the mass in a typical polar hole and occupy about 10 of the volume. Author

Subject Categories:

  • Astrophysics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE