Results of spectroscopic studies of solar active regions performed on Salyut 4
Abstract
The Salyut-4 solar telescope obtained stigmatic spectra of solar active regions in the 970-1430 A wavelength range with spatial resolution of 3-5 arcsec and spectral resolution of 0.3 A; experiments were carried out in the periods January-February and June-July 1975. The intensities of 145 emission lines in the spectra of two flares and flocculi were obtained. An examination of Lyman-alpha and Lyman-beta profiles of weak flares and flocculi shows that the wings of these lines are mainly broadened by the Stark effect and radiation damping. An examination of Doppler shifts of lines observed in flocculi shows that regions of opposite polarity of the photospheric magnetic field are connected by loops.
- Publication:
-
Izvestiya Ordena Trudovogo Krasnogo Znameni Krymskoj Astrofizicheskoj Observatorii
- Pub Date:
- 1979
- Bibcode:
- 1979IzKry..59....3B
- Keywords:
-
- Astronomical Spectroscopy;
- Salyut Space Station;
- Solar Activity;
- Solar Spectra;
- Spaceborne Telescopes;
- Doppler Effect;
- Lyman Alpha Radiation;
- Lyman Beta Radiation;
- Solar Flares;
- Stark Effect;
- Solar Physics