On the age dependence of the asymmetry of penumbrae of sunspot

Details On the age dependence of the asymmetry of penumbrae of sunspot On the age dependence of the asymmetry of penumbrae of sunspot

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..117..199c&link_type=abstract

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

Physics

3

Chronology, Penumbras, Solar Physics, Sunspots, Solar Activity, Space Observations (From Earth)

Scientific paper

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.

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