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A model of the oscillations in the chromosphere and transition region above sunspot umbrae

✍ Scribed by Y. D. Žugžda; J. Staude; V. Locāns

Publisher
Springer
Year
1984
Tongue
English
Weight
788 KB
Volume
91
Category
Article
ISSN
0038-0938

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On the inhomogeneous structure of the chromosphere-corona transition region above sunspot umbrae
✍ J. Staude 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 398 KB 👁 2 views

Zentralinstitut fiir Astrophysik der Akadcmic der Wissenschaftcn der DDR Sonneiiol~servatoriuin Einsteintnrni IVitli 5 f i p r e s (Rcceivctl 1984 Sovembrr 30) Multiple wavelength observations of sunspot umbrae can only be expalined by an inhomogeneous, two-component model for the structure of the u

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✍ R. B. Teplitskaja; S. A. Grigoryeva (Efendieva); V. G. Skochilov 📂 Article 📅 1978 🏛 Springer 🌐 English ⚖ 467 KB

By means of an inversion of H and K Ca II line profiles the temperature and electron density in the chromosphere above the umbrae of two sunspots have been estimated. The temperature gradient 5 K km -1 exceeds the corresponding values in both quiet regions and plages. At a height of about 1500 km th