NASA NTRS · 19850044510
Two new color-selected magnetic DA white dwarfs
Abstract
The discovery of two magnetic white dwarfs culled from blue star surveys is reported. The surveys were carried out with the Mount Lemnon 1.5-meter reflecting telescope attached to a two-holer polarimeter/photometer. Spectral observations of the objects, (PG 1533 - 057, and K813 - 14), indicate the presence of hydrogen and Zeeman components. On the basis of dipolar field simulations, it is shown that PG 1533 - 057 has a polar field strength of 31 megagauss (MG) while K813 - 14 has a polar field strength of 29 MG. A third known white dwarf has a polar field strength of 18 MG. All the dwarfs had temperatures in the 11,000-20,000 K range. The possibility that a significant fraction of isolated magnetic degenerate stars could be the progeny of magnetic accreting binary systems is considered.
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Liebert, J., Schmidt, G. D., Sion, E. M., Starrfield, S. G., Green, R. F., Boroson, T. A.. 1985-02-01. Two new color-selected magnetic DA white dwarfs. https://ntrs.nasa.gov/citations/19850044510
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