The Explanation of Umbral Dot of Sunspot

Tong Yi; Du Jin-sheng

doi:10.11728/cjss1986.03.192

Volume 6 Issue 3

Aug. 1986

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Tong Yi, Du Jin-sheng. The Explanation of Umbral Dot of Sunspot[J]. Chinese Journal of Space Science, 1986, 6(3): 192-195. doi: 10.11728/cjss1986.03.192

Citation:

Tong Yi, Du Jin-sheng. The Explanation of Umbral Dot of Sunspot[J]. Chinese Journal of Space Science, 1986, 6(3): 192-195. doi: 10.11728/cjss1986.03.192

Tong Yi, Du Jin-sheng. The Explanation of Umbral Dot of Sunspot[J]. Chinese Journal of Space Science, 1986, 6(3): 192-195. doi: 10.11728/cjss1986.03.192

Citation:

Tong Yi, Du Jin-sheng. The Explanation of Umbral Dot of Sunspot[J]. Chinese Journal of Space Science, 1986, 6(3): 192-195. doi: 10.11728/cjss1986.03.192

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The Explanation of Umbral Dot of Sunspot

doi: 10.11728/cjss1986.03.192

Department of Astronomy, Beijing Normal University

Received Date: 1985-11-17
Rev Recd Date: 1900-01-01
Publish Date: 1986-08-24

Abstract

Abstract

In this paper, the form of umbral dots of sunspot was satisfactorily explained by a mechanism of local perturbations in a magnetic tube of sunspot along with the theory of Petschek’s neutral sheet. On the other hand, the special properties of umbral dots of sunspot such as the temperature, magnetic field and its life-time were estimated by Petschek’s formulae. The obtained results were agreed fairly well with observations.