Abstract
The large amount of magnetic flux cycling through an activity complex in a period of six months suggests that the azimuthal magnetic field in the convective zone of the sun is not less than 3×103 gauss and probably is considerable more. A field of 3 kilogauss or more has the effect of blocking the convective heat transport, producing a cool shadow above the azimuthal field and causing heat to accumulate below. The incremental weight of the cool shadow is sufficient to overpower the magnetic buoyancy, pressing the field against the bottom of the convective zone. The accumulation of heat underneath produces a thermal relaxation oscillation that erupts to the surface at intervals of the order of a week, supplying the intermittent emergence of magnetic flux observed in the activity complex.
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References
Brants, J.J. 1985a, Solar Phys. 95, 15.
Brants, J.J. 1985b, Solar Phys. 95, 197.
Brants, J.J. and Steenbeck, J.C.M. 1985, Solar Phys. 96, 229,
Brown, T.M. 1985, Nature 317, 591.
Brown, T.M. 1986, in ‘Seismology of the Sun and Distant Stars,’ ed. D.O. Gough, (D. Reidel, Dordrecht) pp. 199–214.
Deinzer, W., v. Kusserow, H.U., and Stix, M. 1974, Astron. Astrophys. 12, 111.
Deinzer, W. and Stix, M. 1971, Astron. Astrophys. 12, 111.
DeVore, C.R., Sheeley, N.R., and Boris, J.P. 1985, Solar Phys. 92, 1.
Duvall, T.L., Dziembowski, W.A., Goode, P.R., Gough, D.O., Harvey, J.W. and Leibacher, J.W. 1984, Nature 310, 22.
Duvall, T.L. and Harvey, J.W. 1984, Nature 310, 19.
Duvall, T.L., Harvey, J.W., and Pomerantz, M.A. 1986, Nature 321, 500.
Gaizauskas, V., Harvey, K.L., Harvey, J.W. and Zwaan, C. 1983, Astrophys. J. 265, 1056.
Köhler, H. 1970, Solar Phvs. 13, 3.
Köhler, H. 1973, Astron. Astrophys. 25, 467.
Lerche, I. and Parker, E.N. 1972, Astrophys. J. 176, 213.
Libbrecht, K.G. 1986, Nature 319, 753.
Gilman, P.A. 1983, Astrophys. J. Suppl. 53, 243.
Gilman, P.A. and Miller, J. 1981, Astrophys. J. Suppl 46, 211.
Glatzmaier, G.A. 1985, Astrophys. J. 291, 300.
Leighton, R.B. 1964, Astrophys. J. 140, 1547.
Leighton, R.B. 1969, Astrophys. J. 156, 1.
Livi, S.H.B., Wang, J. and Martin, S.F. 1985, Austral. J. Phvs. 38. 855.
Martin, S.F., Livi, S.H.B., and Wang, J. 1985, Austral. J. Phys. 38, 929.
Meyer, F., Schmidt, H.U., and Weiss, N.O. 1977, Mon. Not. Roy. Astron. Soc. 179, 741.
Meyer, F., Schmidt, H.U., Weiss, N.O. and Wilson, P.R. 1974, Mon. Not. Roy. Astron. Soc. 169, 35.
Parker, E.N. 1955a, Astrophys. J. 121, 491.
Parker, E.N. 1955b, Astrophys. J. 122, 293.
Parker, E.N. 1957, Proc. Natl. Acad. Sci. 43, 8.
Parker, E.N. 1970, Annual Rev. Astron. Astrophys. 8, 1.
Parker, E.N. 1971, Astrophys. J. 164, 491.
Parker, E.N. 1978, Astrophys. J. 222, 357.
Parker, E.N. 1979a, Cosmical Magnetic Fields, Oxford, Clarendon Press.
Parker, E.N. 1979b, Astrophys. J. 230, 905.
Parker, E.N. 1979c, Astrophys. J. 232, 291.
Parker, E.N. 1984a, Astrophys. J. 280, 423.
Parker, E.N. 1984b, Astrophys. J. 281, 839.
Parker, E.N. 1987a, Astrophys. J. (15 January).
Parker, E.N. 1987b, Astrophys. J. (submitted).
Parker, E.N. 1987c, Astrophys. J. (submitted).
Parker, E.N. 1987d, Astrophys. J. (submitted).
Rai Choudhuri, A. 1985, Astrophys. J. 281, 846.
Roberts, P.H. 1972, Phil. Trans. Roy. Soc. London A. 272, 663.
Roberts, P.H. and Stix, M. 1972, Astron, Astrophys. 18, 453.
Sheeley, N.R., DeVore, C.R. and Boris, J.P. 1985, Solar Phys. 98, 219.
Spruit, H.C. 1974, Solar Phys. 34, 277.
Steenbeck, M. and Krause, F. 1969a, Astron. Nachr. 291, 49.
Steenbeck, M. and Krause, F. 1969b, Astron. Nachr. 291, 271.
Stix, M. 1973, Astron. Astrophys. 24, 275.
Stix, M. 1976a, Astron. Astrophys. 47, 243.
Stix, M. 1976b, “Basic Mechanisms of Solar Activity,” IAU Symposium No. 71 (ed. J. Kleczek) D. Reidel, Dordrecht.
Wallenhorst, S.G. and Howard, R. 1982, Solar Phys. 76, 203.
Wallenhorst, S.G. and Topka, K.P. 1982, Solar Phys. 81, 33.
Yoshimura, H. 1971, Solar Phys. 18, 417.
Yoshimura, H. 1972a, Solar Phys. 22, 20.
Yoshimura, H. 1972b, Astrophys. J. 178, 863.
Yoshimura, H. 1973, Solar Phys. 33, 131.
Yoshimura, H. 1975, Astrophys. J. Suppl. 29, 467.
Zwaan, C. 1985, Solar Phys. 100, 397.
Zwaan, C., Brants, J.J., and Cram, L.E. 1985, Solar Phys. 95, 3.
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Parker, E.N. (1987). Magnetic Activity Complexes, Thermal Relaxation Oscillations, and the Dynamics of the Azimuthal Magnetic Field of a Star. In: Durney, B.R., Sofia, S. (eds) The Internal Solar Angular Velocity. Astrophysics and Space Science Library, vol 137. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3903-5_30
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DOI: https://doi.org/10.1007/978-94-009-3903-5_30
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