Spectroscopic investigation of two-component umbral structure.
Abstract
On the basis of spectroscopic observations in the lines Fe I 543.5 nm and Na I D2 the main characteristics of simple semi-empirical two-component models of 11 umbrae differing in size (radii 2arcsec - 8arcsec) are studied.
- Publication:
-
Publications of the Astronomical Institute of the Czechoslovak Academy of Sciences
- Pub Date:
- 1987
- Bibcode:
- 1987PAICz..66...33S
- Keywords:
-
- Solar Spectra;
- Sunspots;
- Umbras;
- Brightness Temperature;
- Photosphere;
- Solar Temperature;
- Solar Physics;
- Spectroscopy:Sunspots;
- Sunspots:Models;
- Sunspots:Spectroscopy;
- Sunspots:Umbrae