Solar cycle variations in the growth and decay of sunspot groups
β Scribed by J. Javaraiah
- Publisher
- Springer Netherlands
- Year
- 2011
- Tongue
- English
- Weight
- 646 KB
- Volume
- 338
- Category
- Article
- ISSN
- 0004-640X
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The flux density of a noise storm continuum is known to depend on importance parameters of the associated sunspot group, e.g., its total areaA. A study of the continua at 287, 234, 113, and 64 MHz, however, reveals in case of the two cycles Nos. 20 and 21 that the radiation signatures of sunspot gro
New observations of the umbral limb-darkening are presented. We find a real and significant decrease in the umbra/photosphere intensity ratio towards the limb. This result contrasts the findings of previous authors and we believe this to be the first time such a decrease is reported. Our conclusion