The solar Zeeman effect

[1] P. Zeeman, "Over de invloed eener magnetisatie op den aard van het door een stof uitgezonden licht - II," Versl. Kon. Ak. Wet. 5, 242 (1896)
[2] W. Herschel, "XIII. Observations tending to investigate the nature of the sun, in order to find the causes or symptoms of its variable emission of light and heat; with remarks on the use that may possibly be drawn from solar observations," Phil. Trans. R. Soc. 91:265 (1801)
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[12] G. E. Hale, "Solar Vortices," PASP 20, 203 (1908)
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[16] G. E. Hale, "The Magnetic Polarity of Sun-Spots ," Ap. J. 49, 153 (1919)
[17] H. W. Babcock, "Remarks on Stellar Magnetism," PASP 59, 112 (1947)
[18] J. C. Kemp et al. "Discovery of Circularly Polarized Light from a White Dwarf ," Ap. J. 161, L77 (1970)
[19] J. Trümper et al. "Evidence for strong cyclotron line emission in the hard X-ray spectrum of Hercules X-1," Ap. J. 219, L105 (1978)
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