Abstract
During the course of two observational programs to search for magnetic fields in white dwarfs (Angel and Landstreet, 1970a; Kemp, 1970), it was discovered by Kemp and Swedlund (Kemp et al., 1970b) that the continuum optical radiation from the.λ4135 type white dwarf Grw+70° 8247 is circularly polarized. This circular polarization was measured in a broad band from about 4000 to 7000 Å a number of times; in this band the circular polarization does not appear to vary from its mean value of 3.29% with an amplitude of more than about 0.1% (or 3% of the measured mean polarization) on any time scale from 24 seconds to 2 weeks (Angel and Landstreet, 1970b).
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References
Angel, J. R. P. and Landstreet, J. D.: 1970a, Astrophys. J. (Letters) 160, L147.
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Kemp, J. C., Swedlund, J. B., Landstreet, J. D., and Angel, J. R. P.: 1970b, Astrophys. J. (Letters) 161, L77.
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Angel, J.R.P., Landstreet, J.D. (1971). The Polarization of Radiation from White Dwarfs. In: Luyten, W.J. (eds) White Dwarfs. International Astronomical Union/Union Astronomical International, vol 42. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3081-6_13
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DOI: https://doi.org/10.1007/978-94-010-3081-6_13
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