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Magnetic Fields in AM Her Binaries

  • Kinwah Wu (a1) and Paul A. Mason (a2)

Extract

There is growing evidence of complex white dwarf magnetic fields in CVs (e.g. Meggitt & Wickramasinghe 1989; Robinson & Cordova 1994). The properties of systems with non-dipolar white dwarf magnetic fields have been investigated, and it was found that a non-negligible quadrupole component is essential for the magnetic locking of AM Her binaries (AM Hers) (Wu & Wickramasinghe 1993). In a recent study the ratio of the quadrupole to dipole component of the surface field of white dwarfs was shown to grow by a factor of 10 during the white dwarf cooling lifetime (Muslimov, van Horn & Wood 1995), thus the quadrupole field component is long lived and significant.

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Copyright

References

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Mason, P.A., Andronov, I.L., Kolesnikov, S.V., et al., 1995, in “Magnetic Cataclysmic Variables”, eds Buckley, D., Warner, B., ASP Conf. Ser. 85, 493
Mason, P.A., Liebert, J., Schmidt, G.D., 1989, Ap. J., 346, 941
Meggitt, S.M.A., Wickramasinghe, D.T., 1989, MNRAS, 236, 31
Muslimov, A.G., van Horn, H.M., Wood, M.A., 1995, Ap. J., 442, 758
Ramsay, G., Mason, P.A., 1996, these proceedings, p 213
Robinson, C.R., Córdova, F.A., 1994, Ap. J., 437, 436
Schwope, A., 1995, Rev. Mod. Astron., in press
Wu, K., Wickramasinghe, D.T., 1993, MNRAS, 260, 141

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