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Structure of sunspots

โœ Scribed by Cornelis Zwaan


Publisher
Springer
Year
1975
Tongue
English
Weight
198 KB
Volume
45
Category
Article
ISSN
0038-0938

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โœฆ Synopsis


We present a minimum-gradient model to complement a maximum-gradient model (Zwaan, 1974). Both models are compatible with published continuum intensities and within constraints on the temperature gradient; both are adjusted to Tert = 4000K. In order to explain the visual intensities the minimum-gradient model requires an additional 'line-haze' opacity which is only slightly smaller than in the maxlmum-gradient model.

We show that various published models are not compatible with plausible constraints on the temperature gradient.


๐Ÿ“œ SIMILAR VOLUMES


Structure of sunspots
โœ Cornelis Zwaan ๐Ÿ“‚ Article ๐Ÿ“… 1974 ๐Ÿ› Springer ๐ŸŒ English โš– 669 KB

The sunspot models published so far do not reproduce the observed run of the umbral continuum intensities over the entire spectral range 0.5 < 2 < 4 ~m. Moreover, in several previous models is the temperature gradient smaller than both the adiabatic and the radiative equilibrium gradient. Agreement

Subsurface structure of sunspots
โœ A.G. Kosovichev ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 583 KB
The structure of sunspots
โœ P.A. Sweet ๐Ÿ“‚ Article ๐Ÿ“… 1955 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 737 KB
The structure of a sunspot
โœ P. R. Wilson ๐Ÿ“‚ Article ๐Ÿ“… 1968 ๐Ÿ› Springer ๐ŸŒ English โš– 865 KB

A new model for the structure of a sunspot is put forward. The features of the model are (i) the deep inhibition of convection by magnetic fields, (ii) the formation of a 'cool cone' above the region of inhibition of convective transfer by the energy diverted around tiffs region, and (iii) the devel