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V. Heating and Dynamics of Chromosphere and Corona

Published online by Cambridge University Press:  25 April 2016

G.E. Brueckner

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The crucial role of magnetic fields in any mechanism to heat the outer solar atmosphere has been generally accepted by all authors. However, there is still no agreement about the detailed function of the magnetic field. Heating mechanisms can be divided up into 4 classes: (I) The magnetic field plays a passive role as a suitable medium for the propagation of Alfvén waves from the convection zone into the corona (Ionson, 1984). (II) In closed magnetic structures the slow random shuffling of field lines by convective motions below the surface induces electric currents in the corona which heat it by Joule dissipation (Heyvaerts and Priest, 1984). (Ill) Emerging flux which is generated in the convection zone reacts with ionized material while magnetic field lines move through the chromosphere, transition zone and corona. Rapid field line annihilation, reconnection and drift currents result in heating and material ejection (Brueckner, 1987; Brueckner et al., 1987; Cook et al., 1987). (IV) Acoustic waves which could heat the corona can be guided by magnetic fields. Temperature distribution, wave motions and shock formation are highly dependent on the geometry of the flux tubes (Ulmschneider and Muchmore, 1986; Ulmschneider, Muchmore and Kalkofen, 1987).

Type
Research Article
Information
Transactions of the International Astronomical Union , Volume 20 , Issue 1 , 1988 , pp. 100 - 102
Copyright
Copyright © Kluwer 1988 

References

Armstrong, J.W., Coles, W.A. Kojima, M., and Rickett, B.J.: 1986, “The Sun and the Heliosphere in Three Dimensions”, Marsden, R.G. (ed.), D. Reidel, p. 59 Google Scholar
Antiochos, S.K. and Noci, G.,: 1986, Ap. J. 301, 440 CrossRefGoogle Scholar
Athay, R.G.: 1984, Ap. J. 287, 412 CrossRefGoogle Scholar
Benz, A.O. and Furst, E.: 1987, Astr. Ap. 175, 282 Google Scholar
Bodo, G., Ferrari, A., Massaglia, S., and Rosner, R.: 1987, Ap. J. 313, 432 CrossRefGoogle Scholar
Brueckner, G.E.: 1987, Proceedings of Eslab Symposium 21, “Small Scale Plasma Processes”, ESA/ESTEC Publications, Noordwijk (Netherlands), in pressGoogle Scholar
Brueckner, G.E., Bartoe, H.-D.F., Cook, J.W., Dere, K.P. and Socker, D.G., Kurokawa, H., and McCabe, M., 1987, submitted to Ap. J. Bruner, M.E., and Polleto, G.: 1984, Mem. Soc. Astr. It. 55, 313 Google Scholar
Cook, J.W., Lund, P.A., Bartoe, J.-D.F., Brueckner, G.E., Dere, K.P., and Socker, D.G.: 1987, Proceedings of the 5th Cambridge Workshop on “Cool Stars, Stellar Atmospheres and the Sun”, Cambrlgde, MA, USA, in press Google Scholar
Davila, J.M.: 1987, Ap. J. 317, 514 CrossRefGoogle Scholar
Dere, K.P., Bartoe, J.-D.F., and Brueckner, G.E.: 1986, Ap. J. 310, 456 CrossRefGoogle Scholar
Dere, K.P., Bartoe, J.-D.F., Brueckner, G.E., Cook, J.W., and Socker, D.G.: 1987, Sol. Phys., in press Google Scholar
Einaudi, G. and Mok, Yung: 1987, Ap. J. 319, 520 CrossRefGoogle Scholar
Heyvaerts, J. and Priest, E.R.: 1984, Astr. Ap. 137, 63 Google Scholar
Ionson, J.A.: 1984, Ap. J. 276, 357 CrossRefGoogle Scholar
Lou, Y.Q., and Rosner, R.: 1986, Ap. J. 309, 874 CrossRefGoogle Scholar
McClymont, A.N. and Graig, I.J.D.: 1987, Ap. J. 312, 402 CrossRefGoogle Scholar
Rabin, D. and Moore, R.: 1984, Ap. J. 285, 359 CrossRefGoogle Scholar
Steinolfson, R.S., Priest, E.R., Poedts, S., Nocera, L., and Goosens, M.: 1986, Ap. J. 304, 526 CrossRefGoogle Scholar
Tsubaki, T., Saito, Y., and Suematsu, Y.: 1986, Publ. Astron. Soc. Japan 38, 251 Google Scholar
Ulmschneider, P., Muchmore, D., and Kalkofen, W.: 1987, Astr. Ap. 177, 292 Google Scholar
Ulmschneider, P. and Muchmore, D.: 1986, “Small Magnetic Flux Concentration in the Solar Photosphere”, Deinzer, W., Knblker, M. and Voigt, H.H. (eds.), Abhandl. Akad. Wissensch., Vandenhoeck, and Ruprecht, , Gbttingen, Google Scholar
Van Ballegooijen, A.A.: 1985, Ap. J. 298, 421 CrossRefGoogle Scholar
Withbroe, G.L., Kohl, J.L. and Weiser, H.: 1985, Ap. J. 297, 324 CrossRefGoogle Scholar