Detection of coronal holes from lambda 5303 Fe XIV observations.
Abstract
Photoelectric measurements of intensity are used to estimate the distribution of volume emissivity in the coronal green line over the solar surface. Using this distribution and a calculated dependence of emissivity as a function of temperature and electron density, it is possible to estimate a coronal density distribution. An example is given which shows a region of drastically reduced emissivity - a coronal hole - which was simultaneously detected by spacecraft.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1975
- DOI:
- 10.1086/153384
- Bibcode:
- 1975ApJ...195..801F
- Keywords:
-
- Coronagraphs;
- Emissivity;
- Iron;
- Line Spectra;
- Solar Corona;
- Solar Spectra;
- Electron Density (Concentration);
- Electrophotometry;
- Luminous Intensity;
- Spaceborne Astronomy;
- Solar Physics