Solar cycle variations of sunspot temperatures.
Abstract
Observations obtained during 1983 strengthen the finding that the umbra/photosphere intensity ratio for large sunspots is a linear function of the phase in the solar cycle. Data for the period 1968 - 1983 are presented, thus covering most of the solar cycles 20 and 21.
- Publication:
-
ESA Special Publication
- Pub Date:
- November 1984
- Bibcode:
- 1984ESASP.220..233M
- Keywords:
-
- Solar Activity Cycles:Sunspots;
- Sunspots:Solar Activity Cycles;
- Sunspots:Temperatures;
- Temperatures:Sunspots;
- Photosphere;
- Solar Temperature;
- Sunspot Cycle;
- Umbras;
- Periodic Variations;
- Solar Activity;
- Statistical Correlation;
- Solar Physics