Fabry-Pérot line profiles in the λ5303 å and λ6374 å coronal lines obtained during the 1983 Indonesian eclipse
Abstract
During the total solar eclipse of 11 June, 1983, an imaging dual-channel Fabry-Pérot interferometer was used to obtain line profiles simultaneously in the green λ5303 Å [Fe XIV] and the red λ6374 Å [Fe X] coronal lines at various positions in the corona. Extensive microdensitometry followed by multi-Gaussian curve-fitting analysis has resulted in the determination of coronal temperatures and velocity separations between different pockets of coronal gas in the line of sight over a large extent of the corona. Fewer high temperature zones are to be found in the corona of 1983 compared with our similar green-line measurements of the solar maximum corona of 1980. The data are consistent with a temperature maximum occurring at 1.2 R⊙, as found at the 1980 eclipse, but our new data are insufficient to observe farther out than this radius and so determine the position of a maximum. The velocity field in the corona at the 1983 eclipse is less structured compared with that at the 1980 eclipse and is mainly confined to the zone 20-30km s−1.
- Publication:
-
Solar Physics
- Pub Date:
- January 1991
- DOI:
- 10.1007/BF00151741
- Bibcode:
- 1991SoPh..131...25C
- Keywords:
-
- Fabry-Perot Interferometers;
- Line Spectra;
- Solar Corona;
- Solar Eclipses;
- Solar Spectra;
- Line Of Sight;
- Microdensitometers;
- Signal To Noise Ratios;
- Solar Temperature;
- Velocity Distribution;
- Solar Physics;
- Velocity Field;
- Temperature Zone;
- Line Profile;
- Solar Eclipse;
- Solar Maximum