Zirin, Harold and Lackner, D. Russo (1969) The solar flares of August 28 and 30, 1966. Solar Physics, 6 (1). pp. 86-103. ISSN 0038-0938. doi:10.1007/bf00146799. https://resolver.caltech.edu/CaltechAUTHORS:20200702-122854199
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Abstract
We describe observations of the class 3+ flare of August 28, 1966, made at the Mount Wilson Observatory. This great proton flare followed the sequence: (1) Precursor flare; (2) Filament eruption; (3) Beginning in penumbra of large spot; (4) Rapid elongation in two strands; (5) Great spray and surface wave; (6) Rapid separation of two strands to maximum brightness; and (7) Slow spread of brightness and decay. The soft X-ray burst coincides with stages 3–6, decaying through stage 7; the hard (> 80 keV) burst coincides, but decays more rapidly. Considering a demi-cylinder of emitting material, the soft X-rays are explained by a 4-million-degree plasma, or at least a large flux of electrons with that amount of energy. Given this flux, the microwave burst is explained by synchrotron emission with the low frequency cut-off due to coronal absorption. The class-2 flare of August 30, 1966, is also discussed.
| Item Type: | Article | |||||||||
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| Additional Information: | © 1969 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 02 July 1968; Issue Date January 1969. This research was supported by the Advanced Research Projects Agency under the Office of Naval Research Grant N00014-67-C-0140 and the National Aeronautics and Space Administration under Grant NGR 05 002 034. NASA International University Fellow at the California Institute of Technology, 1967–1968, now at Arcetri Astrophysical Observatory. | |||||||||
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| Subject Keywords: | Microwave; Flare; Surface Wave; Solar Flare; Maximum Brightness | |||||||||
| Issue or Number: | 1 | |||||||||
| DOI: | 10.1007/bf00146799 | |||||||||
| Record Number: | CaltechAUTHORS:20200702-122854199 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20200702-122854199 | |||||||||
| Official Citation: | Zirin, H., Lackner, D.R. The solar flares of August 28 and 30, 1966. Sol Phys 6, 86–103 (1969). https://doi.org/10.1007/BF00146799 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 104208 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 02 Jul 2020 20:01 | |||||||||
| Last Modified: | 16 Nov 2021 18:29 |
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