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The Growth of Facular Area Surrounding Large, Decaying Sunspots

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Abstract

In a previous paper, we investigated the facular area around 31 decaying sunspots of varied size. The growth of facular area as a function of spot decay was marginally significant (r 2 = 0.1255, p = 0.05). Using new data, this paper examines the change in facular area surrounding large decaying sunspots some of which grew very rapidly. The data are from full-disk photometric images taken with CFDT2 (2.5″ pixels). For 10 sunspots, we find a statistically significant increase in facular area as a function of the spot decay rate with a regression coefficient, squared, of r 2 = 0.611 (p < 0.02).

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Authors and Affiliations

  1. San Fernando Observatory, Department of Physics and Astronomy, California State University, Northridge, CA, 91330, U.S.A.

    G. A. Chapman & A. S. Hoffer

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  1. G. A. Chapman
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  2. A. S. Hoffer
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Chapman, G.A., Hoffer, A.S. The Growth of Facular Area Surrounding Large, Decaying Sunspots. Sol Phys 237, 321–328 (2006). https://doi.org/10.1007/s11207-006-0118-1

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  • DOI: https://doi.org/10.1007/s11207-006-0118-1

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