The area ratio of umbra to penumbra (Au/Ap) was investigated for a series of 126 sunspots observed around the maximum of solar activity in 1980. Plotting log (Au) as function of log (Ap) a linear relation is obtained with a slope of 1.10, yielding an average ratio Au/Ap of 0.24 for small spots and o
✦ LIBER ✦
On the age dependence of the asymmetry of penumbrae of sunspots
✍ Scribed by M. Collados; J. C. Toro Iniesta; M. Vázquez; H. Wöhl
- Publisher
- Springer
- Year
- 1988
- Tongue
- English
- Weight
- 407 KB
- Volume
- 117
- Category
- Article
- ISSN
- 0038-0938
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