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Evidence of Complex Field Structure in the Magnetic White Dwarf in EXO 033319–2554.2

Published online by Cambridge University Press:  12 April 2016

Lilia Ferrario  and
D. T. Wickramasinghe
Lilia Ferrario
Affiliation:
The Australian National University, Canberra, Australia
D. T. Wickramasinghe
Affiliation:
The Australian National University, Canberra, Australia

Abstract

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We present detailed theoretical models for polarisation and spectroscopic data from EXO 033319–2554.2 that suggest the presence of two cyclotron emission regions of field strengths B ∼ 5.6 × 107 G and B ∼ 2.8 × 107 G, and which are separated by about 90° on the surface of the white dwarf. The large difference in magnetic field strength and the proximity of the two regions imply a more complex field structure than that of a centred dipole field distribution if it is assumed that the regions are connected by closed field lines.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 114: White Dwarfs , 1989 , pp. 324 - 328
Copyright
Copyright © Springer-Verlag 1989

References

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