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The chromosphere above a sunspot umbra

✍ Scribed by H. A. Beebe; W. E. Baggett; H. S. Yun

Publisher
Springer
Year
1982
Tongue
English
Weight
504 KB
Volume
79
Category
Article
ISSN
0038-0938

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✦ Synopsis

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 study we examined only a specific part of the sunspot umbra which is thought to be coolest over the spot. An optimum model representing such a region is presented and its physical properties are discussed.

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