Halpha observations of the August 12, 1975 type III-RS (reverse slope) bursts.
Abstract
We present Hα filtergram observations of a number of the Type III-RS (reverse slope) bursts that occurred on August 12, 1975. Solar radio emission was peculiar on that date in that a large number, and proportion, of the usually rare reverse slope bursts were observed (Tarnstrom and Zehntner, 1975). We show that the radio bursts coincide in time with a homologous set of Hα flares located at the limbward edge of spot group Mt. Wilson 19598. We propose a model in which the reverse slope bursts are the downward branches of U bursts, whose upward branches are hidden behind the coronal density enhancement over the spot group.
- Publication:
-
Solar Physics
- Pub Date:
- September 1976
- DOI:
- 10.1007/BF00206202
- Bibcode:
- 1976SoPh...50..201L
- Keywords:
-
- H Alpha Line;
- Solar Radio Emission;
- Type 3 Bursts;
- Filtergrams;
- Solar Corona;
- Solar Flares;
- Stellar Models;
- Time Response;
- Solar Physics;
- Flare;
- Radio Emission;
- Radio Burst;
- Solar Radio;
- Density Enhancement