Abstract
Energy transport in a hot flare plasma is examined with particular reference to the influence of fluid motion. On the basis of dimensional considerations the dynamical timescale of the flare plasma is shown to be comparable to the timescale for energy loss by conduction and radiation. It is argued that mass motion is likely to have a profound influence on the evolution of the flare.
The detailed response of a flare filament to a localized injection of energy is then analyzed. Radiative, conductive and all dynamical terms are included in the energy equation. Apart from greatly enhancing the rate of propagation of the thermal disturbance through space, mass motion is found to be significant in transferring energy through the moving fluid.
Finally the predicted thermal structure is discussed and it is concluded that the presence of mass motions in the flare may be inferred from the form of the soft X-ray differential emission measure.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bessey, R. J. and Kuperus, M.: 1970, Solar Phys. 12, 216.
Brown, J. C: 1973, Solar Phys. 31, 143.
Cox, D. P. and Tucker, W. H.: 1969, Astrophys. J. 157, 1157.
Craig, I. J. D., Culhane, J. L., Phillips, K. J. H. and Vesecky, J. F.: 1973, in W. N. Hess (ed.), High Energy Phenomena on the Sun, NASA SP-342, p. 276.
Craig, I. J. D. and Brown, J. C.: 1976, Astron. Astrophys. 49, 239.
Culhane, J. L., Vesecky, J. F. and Phillips, K. J. H.: 1970, Solar Phys. 15, 394.
Herring, J. R. H. and Craig, I. J. D.: 1973, Solar Phys. 28, 169.
Herring, J. R. H.: 1974, Solar Phys. 39, 175.
Korchak, A. A.: 1971, Solar Phys. 18, 284.
Korchak, A. A. and Platov, J. V.: 1968, Astron. Zh. 45, 1185.
Landini, M., Fossi, B. C. Monsignori and Pallavicini, R.: 1975, Solar Phys. 44, 101.
Linhart, J. G.: 1960, Plasma Physics, North Holland Publ. Co., Amsterdam.
Moore, R. L. and Datlowe, D. W.: 1975, Solar Phys. 43, 189.
Nakagawa, V., Wu, S. T. and Han, S. M.: 1973, Solar Phys. 30, 111.
Richtmyer, R. D. and Morton, K. W.: 1967, Difference Methods for Initial Value Problems, Interscience Publishers, New York.
Shmeleva, O. P. and Syrovatskii, S. I.: 1973, Solar Phys. 33, 341.
Spitzer, L.: 1962, Physics of Fully Ionized Gases, 2nd ed. John Wiley & Sons, New York.
Strauss, F. M. and Papagiannis, M. D.: 1971, Astrophys. J. 164, 369.
Sturrock, P. A.: 1973, in W. N. Hess (ed.), High Energy Phenomena on the Sun, NASA SP-342, p. 3.
Tucker, W. H. and Koren, M.: 1971, Astrophys. J. 168, 283.
Vaiana, G. S., Krieger, A. S. and Timothy, A. F.: 1973, Solar Phys. 32, 81.
Zaumen, W. T. and Acton, L. W.: 1974, Solar Phys. 36, 139.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Craig, I.J.D., McClymont, A.N. Mass motions in a heated flare filament. Sol Phys 50, 133–151 (1976). https://doi.org/10.1007/BF00206198
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00206198