Abstract
Expressions are derived for the Stokes parameters of light scattered by a layer of free electrons and hydrogen atoms in a sunspot. A physically reasonable sunspot model was found so that the direction of the calculated linear polarization agrees reasonably with observations. The magnitude of the calculated values of the linear polarization agrees generally with values observed in the continuum at 5830 Å. Circular polarization in the continuum also accompanies electron scattering in spot regions; however for commonly accepted values of the longitudinal magnetic field, the predicted circular polarization is much smaller than observed.
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References
Allen, C. W.: 1955, Astrophysical Quantities, Athlone Press, Univ. London.
Angel, J. R. P.: 1973, ‘Mechanisms that Produce Linear and Circular Polarization’, presented at the IAU Colloquium No. 23 in Tucson, Ariz.
Bray, R. J. and Loughhead, R. E.: 1964, Sunspots, Barnes and Noble, Inc., New York.
Chandrasekhar, S.: 1960, Radiative Transfer, Dover Inc., New York.
Finn, G. D. and Kemp, J. C.: 1974, Monthly Notices Roy. Astron. Soc. 167, 375.
Illing, R. M. E., Landman, D. A., and Mickey,D. L.: 1974, Astron. Astrophys., in press.
Leroy, J. L.: 1962, Ann. Astrophys. 25, 127.
Michard, R.: 1953, Ann. Astrophys. 16, 217.
Mickey, D. L. and Orrall, F. Q.: 1974, private communication.
Unno, W.: 1956, Publ. Astron. Soc. Japan 8, 108.
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Finn, G.D., Jefferies, J.T. The polarization of continuum radiation in sunspots. Sol Phys 39, 91–106 (1974). https://doi.org/10.1007/BF00154972
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DOI: https://doi.org/10.1007/BF00154972