Determination of plasma parameters from soft X-ray images for coronal holes (open magnetic field configurations) and coronal large-scale structures (extended closed-field configurations).
Abstract
In connection with high-quality solar soft X-ray images the 'quiet' features of the inner corona have been separated into two sharply different components, including the strongly reduced emission areas or coronal holes (CH) and the extended regions of looplike emission features or large-scale structures (LSS). Particular central meridian passage observations of the prominent CH1 on August 21, 1973, are selected for a quantitative study. Histogram photographic density distributions for full-disk images at other central meridian passages of CH 1 are also presented, and the techniques of converting low photographic density data to deposited energy are discussed, with particular emphasis on the problems associated with the CH data.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1977
- DOI:
- 10.1086/155429
- Bibcode:
- 1977ApJ...215..919M
- Keywords:
-
- Magnetic Field Configurations;
- Solar Corona;
- Solar Magnetic Field;
- Solar X-Rays;
- Astronomical Photography;
- Irradiance;
- Plasma Density;
- Plasma Temperature;
- Skylab Program;
- Solar Physics