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Observations of the Two-Level Structure of Sunspot Magnetic Fields

Published online by Cambridge University Press:  14 August 2015

H. I. Abdussamatov
H. I. Abdussamatov*
Affiliation:
Pulkovo Observatory, U.S.S.R.

Extract

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Inhomogeneity of magnetic field structure, ‘granulation’ in sunspot umbrae and fine structure of the Evershed motions lead to the conclusion that the sunspot umbra is composed of magnetic ropes (or plaits) with dimensions near the limit of resolution. Progress in the study of these ropes is closely connected with the possibility of obtaining extensive spectroscopic information about some selected regions on the solar disc. It is extremely interesting to obtain a picture of short-time-scale variations of the magnetic field strength and the radial velocity field in connection with the transfer of energy from the photosphere to the upper layers of the solar atmosphere (chromosphere, corona).

Type
Part III: Observations of Sunspot and Active Region Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 43: Solar Magnetic Fields , 1971 , pp. 231 - 234
Copyright
Copyright © Reidel 1971 

References

Abdussamatov, H. I.: 1970, Astron. Zh. 47, 82.Google Scholar
Abdussamatov, H. I. and Krat, V. A.: 1969, Solar Phys. 9, 420.CrossRefGoogle Scholar
White, O. R. and Wilson, P. R.: 1966, Astrophys. J. 146, 250.CrossRefGoogle Scholar