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Modelling p-Mode Interaction with a Spreading Sunspot Field

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Abstract

Sunspots absorb and scatter incident p modes. The dominant mechanism is still uncertain. One possibility, mode conversion to slow magneto-acoustic waves, has been shown to yield results in agreement with observations for the f mode only. Absorption of p modes in simple vertical magnetic field models is too weak by an order of magnitude or more. Here we report on numerical calculations of p modes encountering a simple sunspot model with field which spreads with height. It is found that p-mode absorption is greatly enhanced by field spread, to a level consistent with observations, and it appears that it occurs preferentially in the outer regions of the spot, in line with recent results from acoustic holography.

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References

  • Bogdan, T. J.: 1999, in T. Rimmele, K. S. Balasubramaniam, and R. Radick (eds.), Axisymmetric Sunspot Oscillations, Proc. 19th NSO/SP Workshop on High Resolution Solar Physics: Theory, Observations, and Techniques.

  • Bogdan, T. J. and Cally, P. S.: 1997, Proc. Roy. Soc. London A453, 943.

    Google Scholar 

  • Bogdan, T. J., Brown, T. M., Lites, B. W., and Thomas, J. H.: 1993, Astrophys. J. 406, 723.

    Google Scholar 

  • Braun, D. C.: 1995, Astrophys. J. 451, 859.

    Google Scholar 

  • Braun, D. C., Duvall, T. L., and LaBonte, B. J.: 1987, Astrophys. J. 319, L27.

    Google Scholar 

  • Braun, D. C., Duvall, T. L., and LaBonte, B. J.: 1988, Astrophys. J. 335, 1015.

    Google Scholar 

  • Cally, P. S.: 1995, Astrophys. J. 451, 372.

    Google Scholar 

  • Cally, P. S. and Bogdan, T. J.: 1993, Astrophys. J. 402, 732.

    Google Scholar 

  • Cally, P. S. and Bogdan, T. J.: 1997, Astrophys. J. 486, L67.

    Google Scholar 

  • Cally, P. S., Bogdan, T. J., and Zweibel, E. G.: 1994, Astrophys. J. 437, 505.

    Google Scholar 

  • Hollweg, J. V.: 1988, Astrophys. J. 335, 1005.

    Google Scholar 

  • Lindsey, C. and Braun, D. C.: 1998, Astrophys. J. 509, L129.

    Google Scholar 

  • Lindsey, C. and Braun, D. C.: 1999, Astrophys. J. 510, 494.

    Google Scholar 

  • Sakurai, T., Goossens, M., and Hollweg, J. V.: 1991, Solar Phys. 133, 247.

    Google Scholar 

  • Spruit, H. C. and Bogdan, T. J.: 1992, Astrophys. J. 391, L109.

    Google Scholar 

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Authors and Affiliations

  1. Department of Mathematics and Statistics, Monash University, PO Box 28M, Victoria, 3800, Australia

    P.S. Cally

  2. High Altitude Observatory, National Center for Atmospheric Research, PO Box 3000, Boulder, CO , 80307, U.S.A.

    P.S. Cally

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  1. P.S. Cally
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Cally, P. Modelling p-Mode Interaction with a Spreading Sunspot Field. Solar Physics 192, 395–401 (2000). https://doi.org/10.1023/A:1005213002513

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  • DOI: https://doi.org/10.1023/A:1005213002513

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