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On the age dependence of the asymmetry of penumbrae of sunspot

Bibcode
1988SoPh..117..199C
DOI
10.1007/BF00148583
Collados, M.; del Toro Iniesta, J. C.; Vazquez, M.; Woehl, H.
Bibliographical reference

Solar Physics (ISSN 0038-0938), vol. 117, no. 1, 1988, p. 199-202.

Advertised on:
3
1988
Number of authors
4
IAC number of authors
3
Citations
3
Refereed citations
3
Description
The age dependence of the recently described asymmetry of penumbrae of large stable sunspots was analyzed. Young sunspots showed shorter eastern penumbrae, which differed by a maximum of + or - 10 percent from their mean width. For older sunspots the western penumbrae became smaller than the mean penumbra, reaching differences of 20 percent for spots of two months in age.
Type
Refereed
Sunspots
Solar activity

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