Abstract
Altrock and Canfield's observations of temperature variation with latitude in the upper solar photosphere refer to higher levels (smaller optical depths) than those to which Dicke and Goldenberg's solar oblateness observations refer. These higher levels account for only 1% of Dicke and Goldenberg's observed intensity. Thus Altrock and Canfield's observations are not inconsistent with models which have been proposed to account for solar oblateness observations by means of a brightness variation with solar latitude.
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Ingersoll, A.P., Chapman, G.A. Temperature variation with latitude in the upper solar photosphere: Relevance to solar oblateness measurements and facular models. Sol Phys 42, 279–288 (1975). https://doi.org/10.1007/BF00149911
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DOI: https://doi.org/10.1007/BF00149911