𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A model of the sunspot umbra

✍ Scribed by S. M. Chitre; G. Shaviv


Publisher
Springer
Year
1967
Tongue
English
Weight
500 KB
Volume
2
Category
Article
ISSN
0038-0938

No coin nor oath required. For personal study only.


πŸ“œ SIMILAR VOLUMES


Models for different sunspot umbrae
✍ O. Kjeldseth Moe; P. Maltby πŸ“‚ Article πŸ“… 1974 πŸ› Springer 🌐 English βš– 259 KB

The recently detected intensity difference between individual, large sunspots in the infrared spectral region is considered. We show that the intensity difference may be explained by a temperature difference of 140-160 K in the upper atmosphere keeping the temperature nearly unchanged below an optic

The chromosphere above a sunspot umbra
✍ H. A. Beebe; W. E. Baggett; H. S. Yun πŸ“‚ Article πŸ“… 1982 πŸ› Springer 🌐 English βš– 504 KB

Spectra of several strong lines of sunspots have been obtained with the Echelle spectrograph at the Vacuum Tower Telescope, Sacramento Peak Observatory. With a variety of model atmospheres, Ca II H, K, and 28498 line profiles were calculated using a non-LTE line formation procedure. In the present