Abstract
We present a diagnostic method for detecting magnetic field gradients and velocity gradients in sunspots through the analysis of Stokes parameters profiles in magnetoactive lines. On one hand, the method is based on the concept of response functions for the Stokes profiles introduced by Landi Degl'Innocenti and Landi Degl'Innocenti (1977); on the other hand, it takes advantage of the diagnostic content of the residuals between observed Stokes profiles and best-fit ‘Unno’-profiles. The analysis of synthesis profiles obtained for the line λ6302.502 FeI forming in the Sunspot Sunspot Model (Avrett, 1981) suggests that the method could actually be promising, at least if the dependence of the magnetic field vector on optical depth is sufficiently simple.
Similar content being viewed by others
References
Auer, L. H., Heasley, J. N., and House, L. L.: 1977, Solar Phys. 55, 47.
Avrett, E. H.: 1981, in L. E. Cram and J. H. Thomas (eds.), The Physics of Sunspots, Sacramento Peak Observatory, p. 235.
Bevington, P. R.: 1969, Data Reduction and Error Analysis for the Physical Sciences, McGraw-Hill, Inc., New York.
Gingerich, O., Noyes, R. W., Kalkofen, W., and Cuny, Y.: 1971, Solar Phys. 18, 347.
Landi Degl'Innocenti, E.: 1976, Astron. Astrophys. Suppl. 25, 379.
Landi Degl'Innocenti, E.: 1985, in M. J. Hagyard (ed.), Measurements of Solar Vector Magnetic Fields, NASA Conference Publication 2374, p. 279.
Landi Degl'Innocenti, E.: 1986, in W. Kalkofen (ed.), Numerical Radiative Transfer, Cambridge University Press, in press.
Landi Degl'Innocenti, E. and Landi Degl'Innocenti, M.: 1977, Astron. Astrophys. 56, 111.
Landolfi, M. and Landi Degl'Innocenti, E.: 1982, Solar Phys. 78, 355.
Landolfi, M., Landi Degl'Innocenti, E., and Arena, P.: 1984, Solar Phys. 93, 269 (Paper I).
Šidlichovský, M.: 1976, Bull. Astron. Inst. Czech. 27, 71.
Unno, W.: 1956, Publ. Astron. Soc. Japan 8, 108.
Zwaan, C.: 1974, Solar Phys. 37, 99.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Landolfi, M. A possible diagnostic method for magnetic field and velocity gradients in sunspots. Sol Phys 109, 287–306 (1987). https://doi.org/10.1007/BF00160653
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00160653