A refined measurement of the sunspot radiative flux deficit |
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| Authors: | R J Bray |
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| Institution: | (1) CSIRO Division of Applied Physics, Sydney, Australia |
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| Abstract: | New measurements of the radiative flux deficits of two large sunspots are presented, based on detailed isophotometric maps. Results are given separately for umbrae and penumbrae. The umbral and penumbral deficits are 4–5 × 1010 and 1–1.5 × 1010 erg cm–2 s–1 respectively, the larger figures ref to the larger spot. Over limited areas centered on the umbral  cores the deficits for the two spots amount to 76 and 86% of the photospheric flux. |
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