Abstract
The problem of how the corona is heated is of central importance in solar physics research. Here it is assumed that the heating occurs in a regular time-dependent manner and the response of the plasma is investigated. If the magnetic field is strong then the dynamics reduces to a one-dimensional problem along the field. In addition if the radiative time in the corona is much longer than the sound travel time then the plasma evolvesisobarically. The frequency with which heat is deposited in the corona is investigated and it is shown that there is a critical frequency above which a hot corona can be maintained and below which the plasma temperature cools to chromospheric values. An evaluation of the isobaric assumption to the solar corona and the implications of time-dependent heating upon the forthcoming SOHO observations are also presented.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Braginsky, S. I.: 1965,Rev. Plasma Phys. 1, 205.
Cargill, P. J.: 1993,Solar Phys. 147, 263.
Cargill, P. J.: 1994a,Astrophys. J. 422, 381.
Cargill, P. J.: 1994b,Solar System Plasma in Space and Time, Geophysical Monograph 84, p. 21.
Cook, J. W., Cheng, C.-C., Jacobs, V. L., and Antiochos, S. K.: 1989,Astrophys. J. 338, 1176.
Davila, J. M.: 1987,Astrophys. J. 317, 514.
Domingo, V., Fleck, B., and Poland, A. I.: 1994,Space Sci. Rev. 70, 7.
Fielder, R. A. S. and Hood, A. W.: 1993,Solar Phys. 146, 297.
Galsgaard, K. and Nordlund, A.: 1995,J. Geophys. Res., submitted.
Heyvaerts, J. and Priest, E. R.: 1983,Astron. Astrophys. 117, 220.
Hildner, E.: 1974,Solar Phys. 35, 123.
Hollweg, J. V.: 1984,Astrophys. J. 277, 392.
Hood, A. W. and Anzer, U.: 1988,Solar Phys. 115, 61.
Ionson, J. A.: 1978,Astrophys. J. 226, 650.
Kopp, R. A. and Poletto, G.: 1993,Astrophys. J. 418, 496.
Mason, H.: 1994,Talk at Advanced PPARC Summer School in Solar Terestrial Physics, QMW College, London.
Meerson, B.: 1989,Astrophys. J. 347, 1012.
Parker, E. N.: 1987,Astrophys. J. 318, 876.
Parker, E. N.: 1988,Astrophys. J. 330, 474.
Poedts, S., Belien, J. C., and Goedbloed, J. P.: 1994,Solar Phys. 151, 271.
Porter, J. G., Toomre, J., and Gebbie, K. B.: 1984,Astrophys. J. 283, 879.
Porter, J. G., Moore, R. L., and Reichmann, E. J.: 1987,Astrophys. J. 323, 380.
Priest, E. R.: 1993, in J. F. Linskey and S. Serio (eds.),Physics of Solar and Stellar Coronae, p. 515.
Rosner, R., Tucker, W. H., and Vaiana, G. S.: 1978,Astrophys. J. 220, 643.
Steele, C. D. C. and Priest, E. R.: 1990,Solar Phys. 125, 295.
Sturrock, P. A., Dixon, W. W., and Klimchuk, J. A.: 1994,Astrophys. J. 356, L31.
Withbroe, G. L. and Noyes, R. W.: 1977,Ann. Rev. Astron. Astrophys. 15, 363.
Wright, A. N. and Rickard, G. J.: 1995,Astrophys. J. 444, 458.
Zirker, J. B.: 1993,Solar Phys. 148, 43.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Walsh, R.W., Bell, G.E. & Hood, A.W. Time-dependent heating of the solar corona. Sol Phys 161, 83–102 (1995). https://doi.org/10.1007/BF00732086
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00732086