𝔖 Bobbio Scriptorium
✦   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

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


On the umbra-penumbra area ratio of suns
✍ P. N. Brandt; W. Schmidt; M. Steinegger 📂 Article 📅 1990 🏛 Springer 🌐 English ⚖ 232 KB

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

The intensity of the penumbra of large s
✍ P. Maltby; N. Mykland 📂 Article 📅 1969 🏛 Springer 🌐 English ⚖ 359 KB

Simultaneous photoelectric observations of sunspot penumbrae at 5790, 6690, 8760 and 16700~ are presented. No change in penumbral intensity from spot to spot is found in a sample of 11 large sunspots.

On fine structure of the magnetic field
✍ H. I. Abdussamatov 📂 Article 📅 1976 🏛 Springer 🌐 English ⚖ 353 KB

From investigating spectrograms of penumbrae of some sunspots it is concluded that the maximum magnetic field strength occurs in dark filaments and amounts to 1800-1900 G; the intensity of the magnetic field in dark filaments is 100-400 G larger than in the neighbouring bright filaments; the bright