Abstract
A detailed analysis of the white dwarf star G62-46 is presented. High signal-to-noise spectroscopy reveals Zeeman splitting of the Hα line profile, indicating the presence of a magnetic field. Model atmosphere calculations are used to demonstrate that the observed energy distribution and line profiles cannot be reconciled with those of a single magnetic hydrogen-line (DA) white dwarf. Instead, G62-46 is shown to be an unresolved double degenerate binary, composed of a featureless DC white dwarf diluting the line profiles of the magnetic DA component. We show from the inferred mass of the DA component that the system most likely has undergone at least one phase of common envelope evolution
Published Version
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