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Source structure of gradual rise and fall bursts at 17 GHz

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Abstract

From ∼ 200 GRF (gradual rise and fall) bursts which have been recorded with the 17 GHz interferometer at Nobeyama, we deduce the following characteristics of GRF bursts: (1) Sources of GRF bursts are broader, less circularly polarized than those of impulsive bursts. (2) The sources are potentially of bipolar structure and have the peak brightness near the position at which the sense of circular polarization changes. (3) The association of GRF bursts with type III bursts, which are indicative of nonthermal electron acceleration, is significantly poorer than that of impulsive bursts.

It is suggested that the sources of GRF bursts or generally of thermal bursts lie relatively high in the solar atmosphere possibly near the top of magnetic loops or arches which divide two regions of opposite magnetic polarity.

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References

  • Alissandrakis, C. E. and Kundu, M. R.: 1978, Astrophys J. 222, 342.

    Google Scholar 

  • Kahler, S.: 1977, Astrophys. J. 214, 891.

    Google Scholar 

  • Kai, K., Sawa, M., Shiomi, Y., Aiba, S., Sekiguchi, H., Shibuya, N., Kosugi, T., and Nakajima, H.: 1980, Publ. Astron. Soc. Japan 32, 371.

    Google Scholar 

  • Kai, K., Kosugi, T., and Nakajima, H.: 1982, Solar Phys. 75, 331.

    Google Scholar 

  • Kundu, M. R.: 1965, Solar Radio Astronomy, Interscience Publishers, New York.

    Google Scholar 

  • Marsh, K. A. and Hurford, G. J.: 1980, BBSO Preprint No. 0191.

  • Marsh, K. A., Zirin, H., and Hurford, G. J.: 1979, Astrophys. J. 228, 610.

    Google Scholar 

  • Nakajima, H., Sekiguchi, H., Aiba, S., Shiomi, Y., Kuwabara, T., Sawa, M., Hirabayashi, H., Kosugi, T., and Kai, K.: 1980, Publ. Astron. Soc. Japan 32, 639.

    Google Scholar 

  • Palavicini, R., Serio, S., and Vaiana, G. S.: 1977, Astrophys. J. 216, 108.

    Google Scholar 

  • Solar Data (Solnechnye Dannye Byul): 1978–1979, U.S.S.R. Academy of Science.

  • Solar-Geophysical Data: 1978–1979, NOAA, U.S. Dept. Commerce, Boulder.

  • Švestka, Z.: 1976, Solar Flares, D. Reidel Publ. Co., Dordrecht, Holland.

    Google Scholar 

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Authors and Affiliations

  1. Tokyo Astronomical Observatory, Mitaka, 181, Tokyo, Japan

    K. Kai, T. Kosugi & H. Nakajima

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  1. K. Kai
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  2. T. Kosugi
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  3. H. Nakajima
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Kai, K., Kosugi, T. & Nakajima, H. Source structure of gradual rise and fall bursts at 17 GHz. Sol Phys 78, 243–252 (1982). https://doi.org/10.1007/BF00151607

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  • DOI: https://doi.org/10.1007/BF00151607

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