Skip to main content Accessibility help
×
Home

Flux-transport and mean-field dynamo theories of solar cycles

  • Arnab Rai Choudhuri (a1)

Abstract

We point out the difficulties in carrying out direct numerical simulation of the solar dynamo problem and argue that kinematic mean-field models are our best theoretical tools at present for explaining various aspects of the solar cycle in detail. The most promising kinematic mean-field model is the flux transport dynamo model, in which the toroidal field is produced by differential rotation in the tachocline, the poloidal field is produced by the Babcock–Leighton mechanism at the solar surface and the meridional circulation plays a crucial role. Depending on whether the diffusivity is high or low, either the diffusivity or the meridional circulation provides the main transport mechanism for the poloidal field to reach the bottom of the convection zone from the top. We point out that the high-diffusivity flux transport dynamo model is consistent with various aspects of observational data. The irregularities of the solar cycle are primarily produced by fluctuations in the Babcock–Leighton mechanism and in the meridional circulation. We summarize recent work on the fluctuations of meridional circulation in the flux transport dynamo, leading to explanations of such things as the Waldmeier effect.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Flux-transport and mean-field dynamo theories of solar cycles
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Flux-transport and mean-field dynamo theories of solar cycles
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Flux-transport and mean-field dynamo theories of solar cycles
      Available formats
      ×

Copyright

References

Hide All
Babcock, H. W. 1961, ApJ, 133, 572
Basu, S. & Antia, H. M. 2010, ApJ, 717, 488
Brown, B. P., Browning, M. K., Brun, A. S., Miesch, M. S., & Toomre, J. 2010, ApJ, 711, 424
Chakraborty, S., Choudhuri, A. R., & Chatterjee, P. 2009, Phys. Rev. Lett., 102, 041102
Charbonneau, P., Beaubien, G., & St-Jean, C. 2007, ApJ, 658, 657
Charbonneau, P. & Dikpati, M. 2000, ApJ, 543, 1027
Chatterjee, P. & Choudhuri, A. R. 2006, Solar Phys., 239, 29
Chatterjee, P., Nandy, D., & Choudhuri, A. R. 2004, A&A, 427, 1019
Choudhuri, A. R. 1989, Solar Phys., 123, 217
Choudhuri, A. R. 1998, The Physics of Fluids and Plasmas: An Introduction for Astrophysicists (Cambridge University Press, Cambridge)
Choudhuri, A. R. 2011, In IAU Symp. 273: Physics of Sun and Star Spots (eds. Choudhury, D. P. & Strassenmeier, K. G.), p. 28
Choudhuri, A. R. 2012, In IAU Symp. 286: Comparative Magnetic Minima: Characterizing quiet times in the Sun and Stars (eds. Mandrini, C. H. & Webb, D. F.), p. 350
Choudhuri, A. R., Chatterjee, P., & Jiang, J. 2007, Phys. Rev. Lett., 98, 131103
Choudhuri, A. R. & Gilman, P. A. 1987, ApJ, 316, 788
Choudhuri, A. R. & Karak, B. B. 2009, RAA, 9, 953
Choudhuri, A. R. & Karak, B. B. 2012, Phys. Rev. Lett., 109, 171103
Choudhuri, A. R., Schüssler, M., & Dikpati, M. 1995, A&A, 303, L29
Dikpati, M. & Gilman, P. A. 2006, ApJ, 649, 498
D'Silva, S. & Choudhuri, A. R. 1993, A&A, 272, 621
Durney, B. R. 1995, Solar Phys., 160, 213
Fan, Y., Fisher, G. H., & DeLuca, E. E. 1993, ApJ, 405, 390
Ghizaru, M., Charbonneau, P., & Smolarkiewicz, P. K. 2010, ApJ, 715, L133
Gilman, P. A. 1983, ApJS, 53, 243
Glatzmaier, G. & Roberts, P. H. 1995, Nature, 377, 203
Goel, A. & Choudhuri, A. R. 2009, RAA, 9, 115
Hathaway, D. H. 2012, ApJ, 760, 84
Hathaway, D. H. & Rightmire, L. 2010, Science, 327, 1350
Hotta, H. & Yokoyama, T. 2010, ApJ, 714, L308
Jiang, J. 2013, In IAU Symp. 294: Solar and Astrophysical Dynamos and Magnetic Activity (eds. Kosovichev, A. G., de Gouvieia Dal Pino, E. M. & Yan, Y.), p. 49
Jiang, J., Cameron, R. H., Schmitt, D., & Isik, E. 2012, ApJ, submitted.
Jiang, J., Chatterjee, P., & Choudhuri, A. R. 2007, MNRAS, 381, 1527
Karak, B. B. 2010, ApJ, 724, 1021
Karak, B. B. & Choudhuri, A. R. 2011, MNRAS, 410, 1503
Karak, B. B. & Choudhuri, A. R. 2012, Solar Phys., 278, 137
Karak, B. B. & Choudhuri, A. R. 2013, In IAU Symp. 294: Solar and Astrophysical Dynamos and Magnetic Activity (eds. Kosovichev, A. G., de Gouvieia Dal Pino, E. M. & Yan, Y.), p. 433
Karak, B. B. & Nandy, D. 2012, ApJ, 761, L13
Leighton, R. B. 1969, ApJ, 156, 1
Longcope, D. W. & Choudhuri, A. R. 2002, Solar Phys., 205, 63
Miesch, M. S., Featherstone, N. A., Rempel, M., & Trampedach, R. 2012, ApJ, 757, 128
Nandy, D. & Choudhuri, A. R. 2002, Science, 296, 1671
Nandy, D., Muñoz-Jaramillo, A., & Martens, P. C. H. 2011 Nature 471, 80
Parker, E. N. 1955, ApJ, 122, 293
Parker, E. N. 1979, Cosmical Magnetic Fields (Oxford University Press, Oxford)
Steenbeck, M., Krause, F., & Rädler, K. H. 1966, Z. Naturforsch., 21, 369
Usoskin, I. G., Solanki, S. K., & Kovaltsov, G. A. 2007, A&A, 471, 301
Waldmeier, M. 1935, Mitt. Eidgen. Sternw. Zurich, 14, 105
Wang, Y.-M., Sheeley, N. R., & Nash, A. G. 1991, ApJ, 383, 431
Yeates, A. R., Nandy, D., & Mackay, D. H. 2008, ApJ, 673, 544
Yoshimura, H. 1975, ApJ, 201, 740
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

Related content

Powered by UNSILO

Flux-transport and mean-field dynamo theories of solar cycles

  • Arnab Rai Choudhuri (a1)

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.