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Solar Magnetism: The State of Our Knowledge and Ignorance

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Abstract

We review some longstanding scientific mysteries related to solar magnetism, with final attention to the mystery of the “turbulent diffusion” essential for the theoretical α ω-dynamo that is believed to be the source of the magnetic fields of the Sun. Fundamental difficulties with the concept of turbulent diffusion of magnetic fields suggest that the solar dynamo problem needs to be reformulated. An alternative dynamo model is proposed, but it remains to be shown that the model can provide the quantitative aspects of the cyclic magnetic fields of the Sun.

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References

  • H.W. Babcock, The topology of the Sun’s magnetic field and the 22-year cycle. Astrophys. J. 133, 572–587 (1961)

    Article  ADS  Google Scholar 

  • H.W. Babcock, H.D. Babcock, The Sun’s magnetic field. Astrophys. J. 121, 349–366 (1955)

    Article  ADS  Google Scholar 

  • R.A. Choudhuri, P. Gilman, Astrophys. J. 316, 788 (1987)

    Article  ADS  Google Scholar 

  • R.A. Choudhuri, M. Schüssler, M. Dikpati, The solar dynamo with meridional circulation. Astron. Astrophys. 303, L29–32 (1995)

    ADS  Google Scholar 

  • M. Dikpati, P. Gilman, K.B. MacGregor, Penetration of dynamo generated magnetic fields into the Sun’s radiative interior. Astrophys. J. 638, 564–575 (2006)

    Article  ADS  Google Scholar 

  • S. D’Silva, Can equipartition fields produce the tilts of the bipolar magnetic regions? Astrophys. J. 407, 385–397 (1993)

    Article  ADS  Google Scholar 

  • S. D’Silva, A.R. Choudhuri, A theoretical model for tilts of bipolar magnetic regions. Astron. Astrophys. 272, 621–633 (1993)

    ADS  Google Scholar 

  • Y. Fan, G.H. Fisher, E.E. DeLuca, The origin of morphological asymmetries in bipolar active regions. Astrophys. J. 403, 390–401 (1993)

    Article  ADS  Google Scholar 

  • Y. Fan, G.H. Fisher, A.N. McClymont, Dynamics of emerging active regions flux loops. Astrophys. J. 436, 907–928 (1994)

    Article  ADS  Google Scholar 

  • V. Gaizauskas, K.L. Harvey, J.W. Harvey, C. Zwaan, Large-scale patterns formed by solar active regions during the ascending phase of cycle 21. Astrophys. J. 265, 1056–1065 (1983)

    Article  ADS  Google Scholar 

  • P.A. Gilman, M. Miesch, Limits to penetration of meridional circulation below the solar convective zone. Astrophys. J. 611, 568–574 (2004)

    Article  ADS  Google Scholar 

  • G.E. Hale, On the probable existence of a magnetic fields in sunspots. Astrophys. J. 28, 315–343 (1908)

    Article  ADS  Google Scholar 

  • I.N. Kitiashvili, A.G. Kosovichev, Numerical dynamical modeling of solar cycles using dynamo formulation with turbulent magnetic helicity. Geophys. Astrophys. Fluid Dyn. (2008, in press)

  • R.B. Leighton, A magneto-kinematic model of the solar cycle. Astrophys. J. 156, 1–26 (1969)

    Article  ADS  Google Scholar 

  • R. Matsumoto, T. Tajima, K. Shibata, M. Kaisig, Three-dimensional magnetohydrodynamics of the emerging magnetic flux in the solar atmosphere. Astrophys. J. 414, 357–371 (1993)

    Article  ADS  Google Scholar 

  • F. Meyer, H.U. Schmidt, N.O. Weiss, P.R. Wilson, Mon. Not. R. Astron. Soc. 169, 35–42 (1974)

    ADS  Google Scholar 

  • F. Meyer, H.U. Schmidt, N.O. Weiss, Mon. Not. R. Astron. Soc. 179, 749 (1977)

    ADS  Google Scholar 

  • E.N. Parker, The formation of sunspots from the solar toroidal, field. Astrophys. J. 121, 491–507 (1955a)

    Article  ADS  Google Scholar 

  • E.N. Parker, Hydromagnetic dynamo models. Astrophys. J. 122, 293–314 (1955b)

    Article  ADS  MathSciNet  Google Scholar 

  • E.N. Parker, The solar hydromagnetic dynamo. Proc. Nat. Acad. Sci. USA 43, 8–14 (1957)

    Article  ADS  Google Scholar 

  • E.N. Parker, Sunspots and the physics of magnetic flux tubes. I. The general nature of the sunspot. Astrophys. J. 230, 905–913 (1979)

    Article  ADS  Google Scholar 

  • E.N. Parker, Stellar fibril magnetic systems. I. Reduced energy state. Astrophys. J. 283, 343–348 (1984)

    Article  ADS  Google Scholar 

  • E.N. Parker, Theoretical properties of Ω-loops in the convective zone of the Sun. I. Emerging bipolar magnetic regions. Astrophys. J. 433, 867–874 (1994)

    Article  ADS  Google Scholar 

  • G. Rüdiger, L.L. Kitchatinov, The slender solar tachocline. Astron. Nachr. 318, 273–279 (1997)

    Article  MATH  ADS  Google Scholar 

  • M. Schüssler, P. Caligar, A. Feriz-Mas, F. Moreno-Insertis, Instability and eruption of magnetic flux tubes in the solar convective zone. Astron. Astrophys. 281, L69–L72 (1994)

    ADS  Google Scholar 

  • N.R. Sheeley, Measurements of solar magnetic fields. Astrophys. J. 144, 723–732 (1966)

    Article  ADS  Google Scholar 

  • N.R. Sheeley, Y.M. Wang, C.R. DeVore, Implications of a strongly peaked polar magnetic field. Sol. Phys. 124, 1–13 (1989)

    Article  ADS  Google Scholar 

  • H.C. Spruit, A model of the solar convective zone. Sol. Phys. 43, 277–290 (1974)

    Article  ADS  Google Scholar 

  • H.C. Spruit, A. M Title, A.A. Ballegooijen, Is there a weak mixed polarity background field? Theoretical arguments. Sol. Phys. 110, 115–128 (1987)

    Article  ADS  Google Scholar 

  • P.R. Wilson, N.R. Sheeley, N.B. Snodgrass, The reversal of the solar polar magnetic fields. Sol. Phys. 127, 1–9 (1990)

    Article  ADS  Google Scholar 

  • C. Zwaan, The emergence of magnetic flux. Sol. Phys. 100, 397–414 (1985)

    Article  ADS  Google Scholar 

Download references

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Parker, E.N. Solar Magnetism: The State of Our Knowledge and Ignorance. Space Sci Rev 144, 15–24 (2009). https://doi.org/10.1007/s11214-008-9445-x

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  • DOI: https://doi.org/10.1007/s11214-008-9445-x

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