Abstract
Using two very high resolution, white-light plates of the solar granulation, we measure a characteristic size and intensity for facular points. The plates were obtained with the 50 cm refractor at Pic-du-Midi Observatory using a 60 Å bandpass filter center at 5750 Å. After adjustment for atmospheric and instrumental smearing, we find a characteristic size of 0.22 arc sec and a characteristic intensity of 1.3 to 1.5 times the mean continuum intensity.
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References
Dunn, R. B. and Zirker, J. B.: 1973, Solar Phys. 33, 281.
Foukal, P., Duvall, T., and Gillespie, D.: 1981, Astrophys. J. 249, 394.
Koutchmy, S.: 1977, Astron. Astrophys. 61, 397.
Mehltretter, J. P.: 1974, Solar Phys. 38, 43.
Muller, R.: 1977, Solar Phys. 52, 249.
Muller, R.: 1981, in F. Monyama and J. C. Henoux (eds.), Proceedings of the Japan-France Seminar on Solar Physics, p. 142.
Muller, R.: 1983, Solar Phys. 85, 113.
Spruit, H. C. and Zwaan, C.: 1981, Solar Phys. 70, 207.
Wittman, A.: 1979, in Small-Scale Motions on the Sun, Mitteilungen aus dem Kiepenheuer-Institut Nr. 179, p. 29.
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NAS/NRC Resident Research Associate, on leave from Pic du Midi Observatory, France.
Operated by the Association of Universities for Research in Astronomy, Inc., under contract AST 78-17292 with the National Science Foundation.
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Muller, R., Keil, S.L. The characteristic size and brightness of facular points in the quiet photosphere. Sol Phys 87, 243–250 (1983). https://doi.org/10.1007/BF00224837
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DOI: https://doi.org/10.1007/BF00224837