Abstract
We analyze the UV and X-ray data obtained by the SMM satellite for the flare starting at 02:36 UT on November 12, 1980 in AR 2779. From a detailed revision of the Ov emission, we find that the observations are compatible with energy being released in a zone above the magnetic inversion line of the AR intermediate bipole. This energy is then transported mainly by conduction towards the two distant kernels located in the AR main bipole. One of these kernels is first identified in this paper. Accelerated particles contribute to the energy transport only during the impulsive phase.
We model the observed longitudinal magnetic field by means of a discrete number of subphotospheric magnetic poles, and derive the magnetic field overall topology. As in previous studies of chromospheric flares, the Ov kernels are located along the intersection of the computed separatrices with the photosphere. Especially where the field-line linkage changes ‘discontinuously’, these kernels can be linked in pairs by lines that extend along separatrices. Our results agree with the hypothesis of magnetic energy released by magnetic reconnection occurring on separatrices.
Similar content being viewed by others
References
Campbell, P. M.: 1984,Phys. Rev. A 30, 365.
Cheng, C. C., Pallavicini, R., Acton, L., and Tandberg-Hanssen E.: 1985,Astrophys. J. 298, 887.
Cheng, C. C. and Pallavicini: 1987,Astrophys. J. 318, 459.
De Jager, C. and Boelee, A.: 1984,Solar Phys. 92, 227.
Démoulin, P., Hénoux, J. C., and Mandrini, C. H.: 1994,Astron. Astrophys. 285, 1023.
Démoulin, P., van Driel-Gesztelyi, L., Schmieder, B., Hénoux, J. C., Csepura, G., and Hagyard, M. J.: 1993,Astron. Astrophys. 271, 292.
Démoulin, P., Mandrini, C. H., Rovira, M. G., Hénoux, J. C., and Machado, M. E.: 1994,Solar Phys. 150, 221.
Gaizauskas, V. and Harvey, K. L.: 1991,Proc. Flare 22 Workshop on Dynamics of Solar Flares, Observatoire de Paris, DASOP, p. 25.
Gorbachev, V. S. and Somov, B. V.: 1988,Solar Phys. 117, 77.
Gorbachev, V. S. and Somov, B. V.: 1989,Soviet Astron.,33, 1, 57.
Jardine, M.: 1992,Proceedings of the 26th ESLAB Symposium,ESA SP-346, 141.
Low, B. C.:1992,Astron. Astrophys. 253, 311.
Machado, M. E., Moore, R. L., Hernández, A. M., Rovira, M. G., Hagyard, M. J., and Smith, J. B., Jr.: 1988,Astrophys. J. 326, 425.
Mandrini, C. H. and Machado, M.E.: 1992,Solar Phys. 141, 147.
Mandrini, C. H., Démoulin, P., Hénoux, J. C., and Machado, M. E.: 1991,Astron. Astrophys. 250, 541.
Mandrini, C. H., Rovira, M. G., Démoulin, P., Hénoux, J. C., Machado, M. E., and Wilkinson, L. K.: 1993,Astron. Astrophys. 272, 609
Orwig, L., Frost, K., and Dennis, B.: 1980,Solar Phys. 65, 25.
Poletto, G., Gary. G. A., and Machado, M. E.: 1993,Solar Phys. 144, 113.
Priest, E. R. and Forbes, T.: 1992,J. Geophys. Res. 97(A11), 16757.
Rust, D. M., Simnett, G. M., and Smith, D. F.: 1985,Astrophys. J. 288, 401.
Schmieder, B., Simnett, G. M., Tandberg-Hanssen, E., and Mein, P.: 1988,Astron. Astrophys. 201, 327.
Schmieder, B., van Driel-Gesztelyi, L., Hénoux, J-C., and Simnett, G. M.: 1991,Astron. Astrophys. 244, 533
Schmieder, B., Hagyard, M. J., Guoxiang, A., Hongqi, Z., Kalmán, B., Györi, L.et al.: 1994,Solar Phys. 150, 199.
Sturrock, P. A. (ed.): 1980,Solar Flares, A Monograph from Skylab Workshop II, Colorado University Press, Boulder.
Tang, F. and Wang, H.: 1993Solar Phys. 143, 107.
van Beck, H. F., Hoyng, P., Lafleur, B., and Simnett, G.M.: 1980,Solar Phys. 65, 39.
van Driel-Gesztelyi, L., Hofmann, A., Démoulin, P., Schmieder, B., and Csepura, G.: 1993,Solar Phys. 65, 25.
Vekstein, G. E. and Priest, E. R.: 1992,Astrophys. J. 384, 333.
Wang, J. and Shi, Z.: 1993,Solar Phys. 143, 119.
Wilkinson, L. K., Emslie, A. G., and Gary, G. A.: 1992,Astrophys. J. Lett. 392, L39.
Woodgate, B. E., Tandberg-Hanssen, E., Bruner, E. C., Beckers, J. M., Brandt, J. C., Henze, W., Hyder, C. L., Kalet, M. W., Kenny, P. J., Knox, E. D., Michalitsianos, A. G., Rehse, R., Shine, R. A., and Tinsley, H. D.: 1980,Solar Phys. 65, 73.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bagalá, L.G., Mandrini, C.H., Rovira, M.G. et al. A topological approach to understand a multiple-loop solar flare. Sol Phys 161, 103–121 (1995). https://doi.org/10.1007/BF00732087
Issue Date:
DOI: https://doi.org/10.1007/BF00732087