Abstract
The Yohkoh Soft X-ray Telescope (SXT) is providing a new perspective on solar flares and the solar corona in general. Some selected topics from the initial results of the Yohkoh SXT are presented. Continuous soft X-ray observations from the pre-flare through the post-flare phases indicate that magnetic reconnection of a neutral sheet at the top of the flare loop participates in the flare energy release. The full sun X-ray images show many examples of global changes of magnetic field structure (restructuring) and its activation (heating) with time scale of tens of minutes to hours. Frequent microflares are observed in active regions, especially in flare-producing regions. The broadband filter analysis shows that active region plasmas generally have components with temperatures up to 5 MK in addition to the 2 MK component. A thin long coronal hole along the North-South direction shows rigid rotation with the equatorial rotation rate.
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References
Acton, L., Brunei, M., Stern, R., Hirayama, T., Tsuneta, S., Watanabe, T., and Ogawara, Y.: 1988, Adv. Space. Res. 8, 11–93.
Antonucci, E. and Dodero, M.: 1977, Solar Phys. 53, 179.
Antonucci, E. and Dodero, M.: 1979, Solar Phys. 62, 107.
Bak, P., Tang, C. and Wiesenfeld, K.: 1988, Phys. Rev. A 38, 364.
Bruner, M., Acton, L., Brown, W., Stern, R., Hirayania, T., Tsuneta, S., Watanabe, T., and Ogawara, Y: 1989, Yosemite conference on outstanding problems in solar system plasma physics, Am. Geophysical Union Monograph 54, 187.
Hara, H.: 1992, Master Thesis, Department of Astronomy, The University of Tokyo.
Hara, H., Tsuneta, S., Acton, L. W., Lernen, J. R., and McTiernan, J. M.: 1992, Publ. Astron. Soc. Japan 44, in press.
Hayashi, K.: 1992, Undergraduate Research Program Report, Department of Astronomy, The University of Tokyo.
Krieger, A.: 1977, Coronal Holes and High Speed Wind Streams, Colorado Assoc. Univ. Press, 71.
Kosugi, T.: 1993, this volume.
Levine, R. and Pye, J.: 1980, Solar Phys. 66, 39.
Lin, R.: 1985, Solar Phys. 100, 537.
Lin, R., Schwartz, R., Kane, S., Pelling, R., and Hurley, K.: 1984, ApJ 283, 421.
Lu, E. and Hamilton, R.: 1991, ApJ 380, L89.
Newton, H. and Nunn, M.: 1951, Monthly Notices Roy. Astron. Soc. 111, 413.
Ogawara, Y., Takano, T., Kato, T., Kosugi, T., Tsuneta, S., Watanabe, T., Kondo, I., and Uchida, Y.: 1991, Solar Phys. 136, 1.
Ogawara, Y., et al.: 1993, in preparation.
Pneuman, G: 1981, Solar Flare Magnetohydrodynamics, Gordon and Breach, 379.
Sheeley, N., Nash, A., and Wang, Y.: 1987, ApJ 319, 481.
Shibata, K., Nozawa, S., and Matsumoto, R.: 1992, Publ. Astron. Soc. Japan 44, 265.
Shibata, K., et al.: 1992, Publ. Astron. Soc. Japan 44, in press.
Shimizu, T.: 1992, Master Thesis, Department of Astronomy, The University of Tokyo.
Shimizu, T., Tsuneta, S., Acton, L., Lernen, J., and Uchida, Y.: 1992, Publ. Astron. Soc. Japan 44, in press.
Shimizu, T., et al.: 1993, in preparation.
Tajima, T., Brunei, F., and Sakai, J.: 1982, ApJ (Letters) 245, L45.
Takahashi, T.: 1993, Master Thesis, Dept. of Astronomy, Univ. of Tokyo, in preparation.
Timothy, A., Krieger, A., and Vaiana, G.: 1975, Solar Phys. 42, 135.
Tsuneta, S.: 1987, Solar Phys. 113, 35.
Tsuneta, S., Acton, L., Bruner, M., Lernen, J., Brown, W., Caravalho, R., Catura, R., Freeland, S., Jurcevich, B., Morrison, M., Ogawara, Y., Hirayama, T., and Owens, J.: 1991, Solar Phys. 136, 37.
Tsuneta, S., Hara, H., Shimizu, T., Acton, L., Strong, K., Hudson, H., and Ogawara, Y.: 1992a, Publ. Astron. Soc. Japan 44, in press.
Tsuneta, S., Takahashi, T., Acton, L., Bruner, M., Harvey, K., and Ogawara, Y.: 1992b, Publ. Astron. Soc. Japan 44, in press.
Uchida, Y.: 1993, this volume.
Uchida, Y., et al.: 1992, Publ. Astron. Soc. Japan 44, in press.
Wang, Y., Nash, A., and Sheeley, N.: 1989, Science 245, 712.
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Tsuneta, S., Lemen, J.R. (1993). Dynamics of the Solar Corona Observed with the Yohkoh Soft X-Ray Telescope. In: Linsky, J.F., Serio, S. (eds) Physics of Solar and Stellar Coronae: G.S. Vaiana Memorial Symposium. Astrophysics and Space Science Library, vol 183. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1964-1_9
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DOI: https://doi.org/10.1007/978-94-011-1964-1_9
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