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Astron. Astrophys. 326, 218-220 (1997)

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Research Note

A new period for the magnetic white dwarf KPD 0253+5052

S. Friedrich * 1, 2, M. König 1 and W. Schweizer [FORMULA] 1, 3

1 Institut für Astronomie und Astrophysik, Universität Tübingen, Waldhäuser Str. 64, D-72076 Tübingen, Germany
2 Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803-4001, USA
3 Institut für Theoretische Physik I, Ruhr-Universität Bochum, D-44780 Bochum, Germany

Received 9 October 1996 / Accepted 7 February 1997

Abstract

We present phaseresolved circular polarization measurements of the rotating magnetic white dwarf KPD 0253+5052 . A new and more accurate period of [FORMULA] h for KPD 0253+5052 could be determined by measuring the broadband polarization in the H [FORMULA] and H [FORMULA] lines derived from medium resolution (about 5Å FWHM) spectropolarimetric data at different phases.

Key words: stars: individual: KPD 0253+5052 – stars: white dwarfs

* Visiting Astronomer, German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut Heidelberg jointly with the Spanish National Commission for Astronomy

Send offprint requests to: S. Friedrich, Tübingen

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© European Southern Observatory (ESO) 1997

Online publication: April 20, 1998
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