Abstract
High resolution photographs obtained at the Pic du Midi Observatory show that there are three types of sunspot light bridges according to their morphological structures: the photospheric ones, the penumbral ones and the umbral ones. Consequently there are no specific structures in light bridges; it results that they should not be due to specific physical properties. Properties of the fine structure of a penumbral light bridge are described.
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References
Bray, R. J. and Loughhead, R. E.: 1964, Sunspots, Chapman and Hall Ltd.
Muller, R.: 1973, Solar Phys. 29, 55.
Muller, R.: 1977, Solar Phys. 52, 249.
Vasquez, M.: 1973, Solar Phys. 31, 377.
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Muller, R. The fine structure of light-bridges in sunspots. Sol Phys 61, 297–300 (1979). https://doi.org/10.1007/BF00150414
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DOI: https://doi.org/10.1007/BF00150414