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        Kilo-Gauss Magnetic Fields in Three DA White Dwarfs

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        901596.pdf (PDF, 226Kb)
        Author
        Aznar Cuadrado, R.
        Jordan, S.
        Napiwotzki, R.
        Schmid, H.M.
        Solanki, S.K.
        Mathys, G.
        Attention
        2299/1443
        Abstract
        We have detected longitudinal magnetic fields between 2 and 4 kG in three normal DA white dwarfs (WD0446¡790, WD1105¡048, WD2359¡434) out of a sample of 12 by using optical spectropolarimetry done with the VLT Antu 8 m telescope equipped with FORS1. With the exception of 40 Eri B (4 kG) these are the first positive detections of magnetic fields in white dwarfs below 30 kG. A detection rate of 25 % (3/12) may indicate now for the first time that a substantial fraction of white dwarfs have weak magnetic fields. This result, if confirmed by future observations, would form a cornerstone for our understanding of the evolution of stellar magnetic fields.
        Publication date
        2005
        Published in
        In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334
        Other links
        http://hdl.handle.net/2299/1443
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