Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-25T15:37:14.556Z Has data issue: false hasContentIssue false
  • English
  • Français

Solar and Stellar Dynamos

Published online by Cambridge University Press:  12 August 2011

Nigel O. Weiss
Nigel O. Weiss*
Affiliation:
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, U.K.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Records of the solar magnetic field extend back for millennia, and its surface properties have been observed for centuries, while helioseismology has recently revealed the Sun's internal rotation and the presence of a tachocline. Dynamo theory has developed to explain these observations, first with idealized models based on mean-field electrodynamics and, more recently, by direct numerical simulation, notably with the ASH code at Boulder. These results, which suggest that cyclic activity relies on the presence of the tachocline, and that its modulation is chaotic (rather than stochastic), will be critically reviewed. Similar theoretical approaches have been followed in order to explain the magnetic properties of other main-sequence stars, whose fields can be mapped by Zeeman-Doppler imaging. Of particular interest is the behaviour of fully convective, low-mass stars, which lack any tachocline but are nevertheless extremely active.

Keywords

magnetic fieldsMHDSun: activitySun: magnetic fieldsSun: rotationsunspotsstars: activitystars: magnetic fieldsstars: spots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S271: Astrophysical Dynamics: From Stars to Galaxies , June 2010 , pp. 247 - 260
Copyright
Copyright © International Astronomical Union 2011

References

Abreu, J. A., Beer, J., Steinhilber, S., Tobias, S. M., & Weiss, N. O. 2008, Geophys. Res. Lett., 35, L20109CrossRefGoogle Scholar
Antia, H. M., Basu, S., & Chitre, S. M. 2008, ApJ, 681, 680CrossRefGoogle Scholar
Babcock, H. W. 1961, ApJ, 133, 572CrossRefGoogle Scholar
Balbus, S. A., Bonart, J., Latter, H. & Weiss, N. O. 2009 MNRAS, 400, 176CrossRefGoogle Scholar
Baliunas, S. L., Donahue, R. A., & Soon, W. H. et al. 1995, ApJ, 438, 269CrossRefGoogle Scholar
Baliunas, S. L., Sokoloff, D., & Soon, W. H. 1996, ApJ, 457, L99CrossRefGoogle Scholar
Barnes, J. A., Sargent, H. H., & Tryon, P. V. 1980, in The Ancient Sun, ed. Pepin, R. O., Eddy, J. A. & Merrill, R. B., New York: Pergamon, p. 159Google Scholar
Basu, S. & Antia, H. M. 2010 ApJ, 717, 488CrossRefGoogle Scholar
Beer, J. 2000, Space Sci. Rev., 94, 53CrossRefGoogle Scholar
Boruta, N. 1996, ApJ, 458, 832CrossRefGoogle Scholar
Brajsa, R., Wöhl, H., & Hanslmeier, A. et al. 2009, A&A, 496, 855Google Scholar
Brown, B. P., Browning, M. K., Brun, A. S., Miesch, M. S., & Toomre, J. 2008, ApJ, 689. 1354CrossRefGoogle Scholar
Brown, B. P., Browning, M. K., Brun, A. S., Miesch, M. S., & Toomre, J. 2010, ApJ, 711. 424CrossRefGoogle Scholar
Browning, M. K. 2008, ApJ, 676, 1262CrossRefGoogle Scholar
Browning, M. K., Miesch, M. S., Brun, A. S., & Toomre, J. 2006, ApJ, 648. L157CrossRefGoogle Scholar
Brun, a. S., Browning, M. K., & Toomre, J. 2005, ApJ, 629, 461CrossRefGoogle Scholar
Bushby, P. J. 2003, MNRAS, 342, L15CrossRefGoogle Scholar
Bushby, P. J. 2005, MNRAS, 326, 218Google Scholar
Cattaneo, F. 1999, ApJ, 515, L39CrossRefGoogle Scholar
Cattaneo, F. & Hughes, D. W. 2006, J. Fluid Mech., 553, 401CrossRefGoogle Scholar
Cattaneo, F. & Hughes, D. W. 2008, J. Fluid Mech., 594, 495Google Scholar
Charbonneau, P. 2005, Living Rev. Sol. Phys., 2, 2 (www.livingreviews.org/lrsp-2005-2)CrossRefGoogle Scholar
Charbonneau, P. & Dikpati, M. 2000, ApJ, 543, 1027CrossRefGoogle Scholar
Choudhuri, A. R. & Karak, B. B. 2009, Res. A&A, 9, 453Google Scholar
Christensen, U.R., Schmitt, D, & Rempel, M. 2009 Space. Sci. Rev., 144, 105CrossRefGoogle Scholar
Christensen-Dalsgaard, J. & Thompson, M. J. 2007, In the Solar Tachocline, ed. Hughes, D. W., Rosner, R. & Weiss, N. O., Cambridge: Cambridge University Press, p. 53CrossRefGoogle Scholar
Cowling, T. G. 1975. Nature, 255, 189CrossRefGoogle Scholar
Damon, P. E. & Sonett, C. P. 1991, In The Sun in Time, ed. Sonett, C. P., Giampapa, M. S. & Matthews, M. S., Tucson: University of Arizona Press, p. 360Google Scholar
Dikpati, M., Gilman, P. A., de Toma, G., & Ulrich, R. K. 2010, Geophys. Res. Lett., 37, L14107Google Scholar
Dobler, W., Stix, M., & Brandenburg, A. 2006, ApJ, 638, 336CrossRefGoogle Scholar
Donati, J.-F., Morin, J., & Petit, P. et al. 2008, MNRAS, 390, 545CrossRefGoogle Scholar
Donati, J.-F. & Landstreet, J. D. 2009, ARAA, 47, 333CrossRefGoogle Scholar
Featherstone, N.A., Browning, M.K., Brun, A. S. & Toomre, J. 2009. ApJ, 705, 1000CrossRefGoogle Scholar
Fromang, S. & Papaloizou, J. 2007, A&A, 476, 1113Google Scholar
Fromang, S., Papaloizou, J., Lesur, G., & Heinemann, T. 2007, A&A, 476, 1123Google Scholar
Ghizaru, M., Charbonneau, P. & Smolarkiewicz, P. K. 2010. ApJ, 715, L133CrossRefGoogle Scholar
Gilman, P. A. 1983, ApJSupp, 53, 243CrossRefGoogle Scholar
Glatzmaier, G. A. & Roberts, P. H. 1985, Nature, 377, 203CrossRefGoogle Scholar
Hughes, D. W. 2007, In The Solar Tachocline, ed. Hughes, D.W., Rosner, R. & Weiss, N.O., Cambridge: Cambridge University Press, p. 275CrossRefGoogle Scholar
Hughes, D. W., Rosner, R., & Weiss, N. O., eds, 2007, The Solar Tachocline, Cambridge: Cambridge University PressCrossRefGoogle Scholar
Howe, R. 2009, Living Rev. Sol. Phys., 6, 1 (www.livingreviews.org/lrsp-2009-1)CrossRefGoogle Scholar
Jones, C. A., Thompson, M. J., & Tobias, S. M. 2010, Space. Sci. Rev., 152, 591CrossRefGoogle Scholar
Jouve, L., Proctor, M. R. E., & Lesur, G. 2010, A&A, in pressGoogle Scholar
Leighton, R. B. 1969, ApJ, 156, 1CrossRefGoogle Scholar
Mestel, L. 1999, Stellar Magnetism, Oxford: Clarendon PressGoogle Scholar
Miesch, M. S., Brun, A. S., & Toomre, J. 2006, ApJ, 641, 618CrossRefGoogle Scholar
Miesch, M. S., Brun, A. S., DeRosa, M. L., & Toomre, J. 2008, ApJ, 673, 557CrossRefGoogle Scholar
Miesch, M. S. & Toomre, J. 2009, AR Fluid Mech., 41, 317CrossRefGoogle Scholar
Morin, J., Donati, J.-F., & Petit, P. et al. 2008, MNRAS, 390, 567CrossRefGoogle Scholar
Morin, J., Donati, J.-F., & Petit, P. et al. 2010, MNRAS, in pressGoogle Scholar
Noyes, R. W., Vaughan, A. H., & Weiss, N. O. 1984, ApJ, 287, 769CrossRefGoogle Scholar
Ossendrijver, A. J. H. M. 1997, A&A, 323, 151Google Scholar
Ott, E. 1993, Chaos in Dynamical Systems, Cambridge: Cambridge University PressGoogle Scholar
Parker, E. N. 1955, ApJ, 122, 293CrossRefGoogle Scholar
Parker, E. N. 1993, ApJ, 408, 707CrossRefGoogle Scholar
Platt, N., Spiegel, E., & Tresser, C. 1993, Geophys. Astrophys. Fluid Dyn., 73, 146CrossRefGoogle Scholar
Reiners, A., Basri, G. & Browning, M. 2009, ApJ, 692, 538CrossRefGoogle Scholar
Rüdiger, G. & Hollerbach, R. 2004, The Magnetic Universe, Weinheim: Wiley-VCHCrossRefGoogle Scholar
Saar, S. H. 2002, in ASP Conf. Ser. 277, Stellar Coronae in the Chandra and XMM-NEWTON Era, ed. Favata, F. and Drake, J. J., San Francisco: Astron. Soc. Pacific, p. 311Google Scholar
Saar, S. H. & Brandenburg, A. 1999, ApJ, 524, 295CrossRefGoogle Scholar
Schmitt, D., Schüssler, M., & Ferriz-Mas, A. 1996, A&A, 311, L1Google Scholar
Solanki, S. K., Inhester, B., & Schüssler, M. 2006, Rep. Prog. Phys., 69, 563CrossRefGoogle Scholar
Spiegel, E. A. 1994, in Lectures on Solar and Planetary Dynamos, ed. Proctor, M.R.E. & Gilbert, A.D., Cambridge: Cambridge University Press, p. 245Google Scholar
Spruit, H. C. 2002, A&A, 381, 923Google Scholar
Stuiver, M. & Braziunas, T. F. 1993, Holocene, 3, 289CrossRefGoogle Scholar
Tayler, R. J. 1973, MNRAS, 161, 365CrossRefGoogle Scholar
Thomas, J. H. & Weiss, N. O. 2008, Sunspots and Starspots, Cambridge: Cambridge University PressCrossRefGoogle Scholar
Thompson, M. J., Christensen-Dalsgaard, J., Miesch, M. S., & Toomre, J. 2003, ARAA, 41, 599CrossRefGoogle Scholar
Tobias, S. M., Brummell, N. H., Clune, T. L., & Toomre, J. 1998, ApJ, 502, L177CrossRefGoogle Scholar
Tobias, S. M., Cattaneo, F., & Boldyrev, S. 2011, in The Nature of Turbulence, ed. Davidson, P.A., Kaneda, Y. & Sreenivasan, K.R., Cambridge: Cambridge University PressGoogle Scholar
Tobias, S. M. & Weiss, N. O. 2007, In The Solar Tachocline, ed. Hughes, D.W., Rosner, R. & Weiss, N.O., Cambridge: Cambridge University Press, p. 319CrossRefGoogle Scholar
Tobias, S. M., Weiss, N. O., & Kirk, V. 1995, MNRAS, 273, 1150CrossRefGoogle Scholar
Vögler, A. & Schüssler, M. 2007, A&A, 465, L43Google Scholar
Wagner, G., Beer, J., Masarik, J., Kubik, P. W., Mende, W., Laj, C., Raisbeck, G. M., & Yiou, F. 2001, Geophys. Res. Lett., 28, 303CrossRefGoogle Scholar
Weiss, N. O. 2010, A&G, 51, 3.9Google Scholar
Weiss, N. O., Thomas, J. H., Brummell, N. H., & Tobias, S. M. 2004, ApJ, 600, 1073CrossRefGoogle Scholar
Wright, G. A. E.. 1973, MNRAS, 161, 339CrossRefGoogle Scholar
Yoshimura, H. 1978. ApJ, 226, 706CrossRefGoogle Scholar