A Model of a Coronal Condensation and Abundances of Iron and Nickel
Abstract
A model of a coronal condensation, having an inhomogeneous temperature distribution, is obtained from the data of the total eclipse of February 25, 1952. Assuming that the condensation consists of four components with temperatures of 0.45, 0.9, 1.3 and 2.5x , we estimated the volume fraction of each component as a function of distance from the center of the condensation. The characteristics of our model are (I that two higher temperature components concentrate to the center of the condensation and (2 that for the lowest temperature component the peak of the volume distribution is situated not at the edge but at the part which is >c1O4km from the center, the radius of the whole condensation being about 15 x 10 km (FIG. 2). The abundances of Fe and Ni (relative to hydrogen) are found by comparing the line and continuous spectra of the condensation. The abundances thus found for Fe and Ni show values about 10 times higher than those obtained in the photosphere (FIG. 3).
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- 1964
- Bibcode:
- 1964PASJ...16...58S