Abstract
We have developed a new method to derive the magnetic field distribution on the surfaces of rotating magnetic white dwarfs from phase-resolved flux and circular polarization spectra. An optimization code based on an evolutionary strategy is used to fit synthetic Zeeman spectra for a variety of model geometries described in the framework of a truncated multipole expansion. We demonstrate that the code allows the reconstruction of relatively complex fields using noise-added synthetic input spectra. As a first application, we analyze flux and circular polarization spectra of the polar EF Eri in a low state of accretion taken with FORS1 at the ESO VLT.
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Euchner, F., Jordan, S., Beuermann, K., Gänsicke, B. T., & Hessman, F. V. (2002) A&A 390, 633–647.
Wheatley, P. J. & Ramsay, G. (1998) in Wild Stars in the Old West, ed. S. Howell, E. Kuulkers, & C. Woodward, ASP Conf. Ser. No. 137, 446–447.
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© 2003 Springer Science+Business Media Dordrecht
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Euchner, F., Beuermann, K., Reinsch, K., Jordan, S., Hessman, F.V., Gänsicke, B.T. (2003). Zeeman Tomography of Magnetic White Dwarfs: General Method and Application to EF Eridani. In: de Martino, D., Silvotti, R., Solheim, JE., Kalytis, R. (eds) White Dwarfs. NATO Science Series, vol 105. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0215-8_58
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DOI: https://doi.org/10.1007/978-94-010-0215-8_58
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-1364-5
Online ISBN: 978-94-010-0215-8
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