Photometry of sunspot penumbrae

Bibcode
1988A&A...195..315C
Collados, M.; del Toro Iniesta, J. C.; Vazquez, M.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 195, no. 1-2, April 1988, p. 315-326.

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4
1988
Number of authors
3
IAC number of authors
3
Citations
10
Refereed citations
9
Description
The authors present the results of a statistical analysis of the penumbra of sunspots. The intensity distribution, and several parameters derived from it, is analysed at different heliocentric angles and positions on the spot. It has revealed, on the one hand, that a two-component model is compatible with the observations and that both components lie at the same height, and on the other, that the penumbral asymmetry found by Collados et al. (1987) is confirmed under a photometrical point of view, the western penumbra being slightly shorter than the eastern one.
Type
Refereed
Solar activity
Sunspots
Solar atmosphere
Telescopes

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