AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 52. White Dwarfs, Neutron Stars and Pulsars
Display, Tuesday, June 1, 1999, 10:00am-7:00pm, Southeast Exhibit Hall

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[52.02] White Dwarf Magnetic Fields and the Mass-Radius Relation

I. Suh, G. J. Mathews (University of Notre Dame)

Recently, some puzzling features have emerged from the accumulated radii and masses of white dwarfs based upon Hipparchos parallaxes. In particular, three stars have radii much smaller than prediced from their observed masses on the basis of standard models for white-dwarf structure, unless those white dwarf contain an iron core. In this talk we peresent a revised calculation of the white-dwarf mass-radius relation in the presence of an internal magnetic field. We find that for reasonable field strengths we are able to reproduced the observed radii for these stars as carbon white dwarfs with internal magnetic fields.

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