On the Facular Area Surrounding Decaying Sunspots |
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| Authors: | Email author" target="_blank">G?A?ChapmanEmail author A?S?Hoffer S?R?Walton |
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| Institution: | (1) San Fernando Observatory, Department of Physics and Astronomy, California State University, Northridge, Northridge, CA, 91330, U.S.A. |
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| Abstract: | The change in facular area around decaying sunspots is investigated. The data are from full-disk photometric images from CFDT1 (5 arc sec pixels) obtained at the Ca ii K-line  = 393.4 nm. The 31 active regions are from a list previously used to study the decay rate of sunspots. We find a weak, marginally significant relation between spot decay rate and growth of the surrounding facular region (r2 = 0.1255). We conclude that, for this group of decaying sunspots, the growth or decay of the surrounding facular region was not clearly related to the decay rate of an active region s sunspots. |
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