𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The study of umbral flashes in the umbrae of two sunspots

✍ Scribed by I. P. Turova; R. B. Teplitskaja; G. V. Kuklin

Publisher
Springer
Year
1983
Tongue
English
Weight
786 KB
Volume
87
Category
Article
ISSN
0038-0938

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

A model of the sunspot umbra
A model of the sunspot umbra
✍ S. M. Chitre; G. Shaviv πŸ“‚ Article πŸ“… 1967 πŸ› Springer 🌐 English βš– 500 KB
Changes of the chromosphere model during
Changes of the chromosphere model during β€œumbral flashes”
✍ S. A. Grigoryeva; I. P. Turova; R. B. Teplitskaya πŸ“‚ Article πŸ“… 1989 πŸ› Springer 🌐 English βš– 360 KB

We have carried out calculations, showing how the thermodynamical structure ef the sunspot umbra atmosphere varies during two stages of the oscillatory process of "umbral flashes".

On the umbra-penumbra area ratio of suns
On the umbra-penumbra area ratio of sunspots
✍ P. N. Brandt; W. Schmidt; M. Steinegger πŸ“‚ Article πŸ“… 1990 πŸ› Springer 🌐 English βš– 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