Photometric Study of Chromospheric and Coronal Spikes Observed during the Total Solar Eclipse of 30 June 1973.

摘要

A photometric and colorimetric analysis of a color picture of the very inner solar corona, near the South pole region, is performed. Dimensions and average electron densities of both chromospheric and very fine resolved coronal spikes are deduced. For the coronal spike a half width of 1.67 arc seconds is measured, the estimate of electron density yields log Ne = 10. Some conclusions are attempted on the light of a simultaneously observed spectrum of the same region which appeared to be a disappearing coronal hole. The observations seem to support the concept of a 'striated' corona. (Author)