Structure of Sunspots

The possibility that a sunspot is merely a region in which the product of the absorption coefficient and the density is higher than that of the disk is examined. The equations of radiative equilibrium appropriate to this case are derived and are found to admit of an exact solution. An examination of...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 1946-04, Vol.106 (2), p.101-107
Main Authors: Odgers, G. J., Woolley, R. v. d. R.
Format: Article
Language:English
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Summary:The possibility that a sunspot is merely a region in which the product of the absorption coefficient and the density is higher than that of the disk is examined. The equations of radiative equilibrium appropriate to this case are derived and are found to admit of an exact solution. An examination of this solution shows that the observed contrast between spot and disk can be accounted for by merely postulating an increase of density inside a spot. Other features of spots are also explained in this way, namely the penumbra and the so-called bright ring.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/106.2.101