Abstract
A large surge event appearing in AR 5395 was observed at the Yunnan Observatory on March 19, 1989. Hα spectral profiles of the event are interpreted by using a two-cloud model and the contours of three parameters: excitation temperature, T exc, microturbulent velocity, V t ,and column density of hydrogen atoms at the second level, N 0,2, are obtained, respectively. The question about the unique feature of the solution obtained by the fitting method is also discussed. The results show that the surge is composed of some conglomerated materials with higher temperature and density; the mass ejection is probably intermittent. Neither T exc nor N 0,2 vary with the height over the solar limb but decrease from the center to the periphery of the surge. V t varies from 10 to 30 km s-1 and decreases with height. Some other important parameters, such as electron density, n e ,and electron pressure, P e ,etc., have also been estimated. In the surge, with N 0,2 about 2.0 × 1012 cm-2 and T exc about 8500 K on average, we obtained n e = 1.80 × 1010 cm-3 and P e = 0.023 dyn cm-2. The energy variations of the surge during the ascending phase are estimated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Allen, C. W.: 1972, Astrophysical Quantities, 2nd ed., The Athlone Press, London.
Altschuler, M. D., Lillienquist, C. G., and Nakagawa, Y.: 1969, Solar Phys. 5, 366.
Beckers, J. M.: 1964, Ph.D. Thesis, Utrecht.
Cao, T. J., Xu, A. A., and Tang, Y. H.: 1979, Acta Astron. Sinica 20, 143.
Ding, J. P. and Xu, A. A.: 1984, Chinese J. Space Sci. 4, 89.
Giovanelli, R. and McCabe, M.: 1958, Australian J. Phys. 11, 130.
Gopasyuk, S. I. and Ogir, M. B.: 1963, Izk. Krymsk. Astrofiz. Obs. 30, 195.
Gouttebroze, P., Heinzel, P., and Vial, J. C.: 1993, Astron. Astrophys. Suppl. Series 99, 513.
Gu, X. M., Lin, J., Luan, T., and Schmieder, B.: 1992, Astron. Astrophys. 259, 649.
Gu, X. M., Lin, J., Li, K. J., Xuan, J. Y., Luan, T., and Li, Z. K.: 1994, Astron. Astrophys. 282, 240.
Hu, W. R. and Zhang, B. R.: 1990, Publications of Yunnan Observatory, Special Issue III, p. 1.
Kiepenheuer, K. O.: 1968, in T. Öhman (ed.), Mass Motions in Solar Flares and Related Phenomena, p. 123.
Li, K. J., Ding, Y. J., Gu, X. M., Zhong, S., Xuan, J. and Li, Q.: 1993, Astron. Astrophys. 269, 496.
Li, K. J., Ding, Y. J., Bai, J. M., Zhong, S., Xuan, J. and Li, Q.: 1994, Solar Phys. 150, 87.
Luo, Z.: 1987, M.Sc. Thesis, Yunnan Observatory.
Mein, P. and Mein, N.: 1988, Astron. Astrophys. 203, 162.
Platov, Yu. V.: 1973, Solar Phys. 28, 477.
Poland, A., Skumanich, A., Athay, R. G., and Tandberg-Hanssen, E.: 1971, Solar Phys. 18, 391.
Roy, J. R.: 1973a, Solar Phys. 32, 139.
Roy, J. R.: 1973b, Solar Phys. 28, 95.
Roy, J. R. and Leperskas, H.: 1973, Solar Phys. 30, 449.
Rust, D. M.: 1968a, Astrophys. J. 73, 75.
Rust, D. M.: 1968b, IAU Symp. 35, 77.
Schmieder, B., Vial, J. C., Mein, P., and Tandberg-Hanssen, E.: 1983, Astron. Astrophys. 127, 337.
Schmieder, B., Mein, P., Martres, M. J., and Tandberg-Hanssen, E.: 1984, Solar Phys. 94, 133.
Schmieder, B., Van Driel-Gesztelyi, L., Gerlei, O., and Simnett, G. M.: 1993, Solar Phys. 146, 163.
Schmieder, B., Golub, L., and Antiochos, K.: 1994, Astrophys. J. 425, 326.
Shibata, K., Nozawa, S., and Matsumoto, R.: 1992, Publ. Astron. Soc. Japan 44, 265.
Smith, H. J. and Smith, E. V. P.: 1963, Solar Flares, The Macmillan Co., New York.
Sturrock, P. A.: 1972, in P. S. McIntosh and M. Dryer (eds.), Solar Activity Observations and Predictions, MIT Press, Cambridge, p. 173.
Sturrock, P. A.: 1980, Solar Flares, Colorado Associated University Press, Boulder, Colorado.
Švestka, Z.: 1976, Solar Flares, D. Reidel Publ. Co., Dordrecht, Holland, p. 221.
Uchida, Y.: 1969, Publ. Astron. Soc. Japan 21, 128.
Vorpahl, J. and Pope, T.: 1972, Solar Phys. 25, 347.
Westin, H.: 1969, Solar Phys. 7, 393.
Wang, J. L.: 1990, Publications of Yunnan Observatory, Special Issue III, p. 20.
Xu, A. A.: 1980, Acta Astron. Sinica 21, 27.
Xu, A. A., Ding, J. P., and Ying, S. Y.: 1984, Acta Astron. Sinica 25, 27.
Xuan, J. Y. and Lin, J.: 1993, Solar Phys. 144, 307.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kejun, L., Jun, L., Xiaoma, G. et al. A quantitative analysis of the surge of March 19, 1989. Sol Phys 168, 91–103 (1996). https://doi.org/10.1007/BF00145827
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00145827