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Propagation and confinement of energetic electrons in solar flares

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Abstract

The propagation, cofinement and total energy of energetic (>25 keV) electrons in solar flares are examined through a brief review of the following hard X-ray measurements: (1) spatially resolved observations obtained by imaging instruments; (2) stereoscopic observations of partially occulted sources providing radial (vertical) spatial resolution; and (3) directivity of the emission measured through stereoscopic observations and the center-to-limb variation of the occurrence frequency of hard X-ray flares. The characteristics of the energetic electrons are found to be quite distinct in impulsive and gradual hard X-ray flares. In impulsive flares the non-thermal electron spectrum seems to extend down to ∼2 keV indicating that the total energy of non-thermal electrons is much larger than that assumed in the past.

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References

  • Arnoldy, R.L., Kane, S.R., and Winckler, J.R.: 1968, Astrophys. J. 151, 711.

    Article  ADS  Google Scholar 

  • Bai, T., and Ramaty, R.: 1978, Astrophys. J. 219, 705.

    Article  ADS  Google Scholar 

  • Bai, T., and Ramaty, R.: 1979, Astrophys. J. 227, 1072.

    Article  ADS  Google Scholar 

  • Brown, J.C.: 1972, Solar Phys. 25, 158.

    Article  ADS  Google Scholar 

  • Brown, J.C.: 1973, Solar Phys. 31, 143.

    Article  ADS  Google Scholar 

  • Brown, J.C.: 1986, in D.F.Neidig (ed.), The Lower Atmosphere of Solar Flares, National Solar Observatory Publ., p. 431.

  • Brown, J.C., Carlaw, V.A., Cromwell, D., and Kane, S.R.: 1983, Solar Phys. 88, 281.

    Article  ADS  Google Scholar 

  • Brown, J.C., and McCloymont, A.N.: 1975, Solar Phys. 41, 135.

    Article  ADS  Google Scholar 

  • Dennis, B.R.: 1985, Solar Phys. 100, 465.

    Article  ADS  Google Scholar 

  • Dermer, C.D., and Ramaty, R.: 1986, Astrophys. J. 301, 962.

    Article  ADS  Google Scholar 

  • Duijveman, A., Hoyng, P., and Machado, M.E.: 1982, Solar Phys. 81, 137.

    Article  ADS  Google Scholar 

  • Duijveman, A., and Hoyng, P.: 1983, Solar Phys. 86, 279.

    Article  ADS  Google Scholar 

  • Emslie, A.G.: 1983, Solar Phys. 86, 133.

    Article  ADS  Google Scholar 

  • Frost, K.J., and Dennis, B.R.: 1971, Astrophys J. 165, 655.

    Article  ADS  Google Scholar 

  • Henoux, J.C.: 1975, Solar Phys. 42, 219.

    Article  ADS  Google Scholar 

  • Hoyng, P., Brown, J.C., and Van Beek, H.F.: 1976, Solar Phys. 48, 197.

    Article  ADS  Google Scholar 

  • Hudson, H.S.: 1972, Solar Phys. 24, 414.

    Article  ADS  Google Scholar 

  • Hudson, H.S.: 1978, Astrophys. J. 224, 235.

    Article  ADS  Google Scholar 

  • Hurley, K., Niel, M., Talon, R., Estulin, I.V., and Dolidze, V.Sh.: 1983, Astrophys J. 265, 1076.

    Article  ADS  Google Scholar 

  • Kane, S.R.: 1974, in G. Newkirk Jr. (ed), ‘Coronal Disturbances,’ IAU Symp. 57, 105.

  • Kane, S.R.: 1983, Solar Phys. 86, 355.

    Article  ADS  Google Scholar 

  • Kane, S.R., and Anderson, K.A.: 1970, Astrophys. J. 162, 1003.

    Article  ADS  Google Scholar 

  • Kane, S.R. et al.: 1980, in P. Sturrock (ed.), Solar Flares, Chapter 5, Colorado Assoc. Univ Press.

  • Kane, S.R., Fenimore, E.E., Klebesadel, R.W., and Laros, J.: 1982, Astrophys. J. Letters 254, L53.

    Article  ADS  Google Scholar 

  • Kane, S.R., Love, J.J., Neidig, D.F., and Cliver, E.W.: 1985, Astrophys. J. Letters 290, L45.

    Article  ADS  Google Scholar 

  • Kane, S.R., and Urbarz, H.W.: 1986, in M.A. Shea and D.F. Smart (eds.), Proc. STIP Symposium on Retrospective Analyses, Book Crafters, Inc.

  • Kane, S.R., Fenimore, E.E., Klebesadel, R.W., and Laros, J.: 1987, in H. Coffey and J. Allen (eds), Solar Geophysical Activity Reports for STIP Intervals XV and XVI, World Data Center A Report UAG-96, p. 101.

  • Kane, S.R., Fenimore, E.E., Klebesadel, R.W., and Laros, J.: 1988, Astrophys. J. (in press).

  • Kiplinger, A.L., Dennis, B.R., Emslie, A.G., Frost, K.J., and Orwig, L.E.: 1983, Astrophys. J. Letters 265, L99.

    Article  ADS  Google Scholar 

  • Langer, S., and Petrosian, V.: 1977, Astrophys. J. 215, 666.

    Article  ADS  Google Scholar 

  • Lin, R.P., and Hudson, H.S.: 1976, Solar Phys. 50, 153.

    Article  ADS  Google Scholar 

  • MacKinnon, A.L., Brown, J.C., and Hayward, J.: 1985, Solar Phys. 99, 231.

    Article  ADS  Google Scholar 

  • Melrose, D.B., and Brown, J.C.: 1976, Monthly Notices Roy. Astron. Soc. 176, 15.

    Article  ADS  Google Scholar 

  • Ogawara, Y. et al.: 1987, Solar Phys. (in press).

  • Ohki, K., Takakura, T., Tsuneta, S., and Nitta, N.: 1983, Solar Phys. 86, 301.

    Article  ADS  Google Scholar 

  • Petrosian, V.: 1985, Astrophys. J. 299, 987.

    Article  ADS  Google Scholar 

  • Rieger, E. Reppin, C. Kanbach, G., Forrest, D.J., Chupp, E.L., and Share, G.H.: 1983, in 18th International Cosmic Ray Conference Proc. (Later Papers), Bangalore, 10, 338.

  • Takakura, T., and Kai, K.: 1966, Publ. Astr. Soc. Japan 18, 57.

    ADS  Google Scholar 

  • Takakura, T., Ohki, K., Tsuneta, S., and Nitta, N.: 1983, Solar Phys. 86, 323.

    Article  ADS  Google Scholar 

  • Takakura, T., Ohki, K., Nitta, N., and Wang, J.L.: 1984, Astrophys. J. Letters 281, L51.

    Article  ADS  Google Scholar 

  • Takakura, T., Ohki, K., Sakurai, T., Wang, J.L., Xuan, J.Y., Li, S.C., and Zhao, R.Y.: 1984, Solar Phys. 94, 359.

    Article  ADS  Google Scholar 

  • Takakura, T., Tanaka, K., Nitta, N., Kai, K., and Ohki, K.: 1986, Solar Phys. 107, 109.

    Article  ADS  Google Scholar 

  • Tsuneta, S., Takakura, T., Nitta, N., Ohki, K., Tanaka, K., Makishima, K., Murakami, T., Oda, M., Ogawara, Y., and Kondo, I.: 1984, Astrophys. J. 280, 887.

    Article  ADS  Google Scholar 

  • Tsuneta, S.: 1985, private communication mentioned in MacKinnon et al. (1985).

  • Vestrand, W.T., Forrest, D.J., Chupp, E.L., Rieger, E., and Share, G.H.: 1987, Astrophys. J. 322, 1010.

    Article  ADS  Google Scholar 

  • Vilmer, N., Kane, S.R., and Trottet, G.: 1982, Astron. Astrophys. 108, 306.

    ADS  Google Scholar 

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  1. Space Sciences Laboratory, University of California, 94720, Berkeley, CA

    S. R. Kane

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  1. S. R. Kane
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Kane, S.R. Propagation and confinement of energetic electrons in solar flares. Sol Phys 113, 145–164 (1987). https://doi.org/10.1007/BF00147693

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  • DOI: https://doi.org/10.1007/BF00147693

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