Established and Non-Established Properties of Umbral and Penumbral Fine Structures

Bibcode
1987rfsm.conf..140G
García de La Rosa, J. I.
Bibliographical reference

The Role of Fine-Scale Magnetic Fields on the Structure of the Solar Atmosphere, Proceedings of the Inaugural workshop and round table discussion for the D-E-S Telescope installations on the Canary Islands, La Laguna, Tenerife, Spain, 6-12 October 1986. Edited by E.-H. Schröter, M. Vázquez, and A.A. Wyller. Cambridge: Cambridge University Press, 1987., p.140

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0
1987
Number of authors
1
IAC number of authors
0
Citations
25
Refereed citations
21
Description
Four main aspects of umbral and penumbral fine structures are considered: brightness and morphology, magnetic field, velocity and oscillations. The author discusses a model in which penetrative convection produces peripheric umbral dots and upward flowing matter which is channeled outwards, pushing the magnetic field aside. The possibility of a non-thermal origin for the central umbral dots cannot be excluded. This model is in agreement with the fine structure observations.
Type
Non-refereed

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