Fossil Fields in Magnetic White Dwarfs

Details Fossil Fields in Magnetic White Dwarfs Fossil Fields in Magnetic White Dwarfs

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..334..153w&link_type=abstract

14th European Workshop on White Dwarfs, ASP Conference Series, Vol. 334 Proceedings of a meeting held at Kiel, July 19-23, 2004

Astronomy and Astrophysics

Astronomy

2

Scientific paper

Magnetic white dwarfs with fields greater than ≈ 106 G form ≈ 10% of all white dwarfs and exhibit a mass distribution with a mean mass of ≈ 0.93 M&sun; compared to ≈ 0.58 M&sun; for all white dwarfs. We investigate two possible explanations for these observations. First, that the Initial-Final Mass Relationship is influenced by the presence of a magnetic field and that the observed high field white dwarfs originate from stars on the Main Sequence that are recognised as magnetic (the chemically peculiar A and B stars). Second, that the Initial-Final Mass Relationship is essentially unaffected by the presence of a magnetic field, and that the magnetic white dwarfs have progenitors that are not restricted to this groups of stars. In either scenario, the magnetic fields of the high field magnetic white dwarfs could be fossil remnants from the Main Sequence phase consistent with magnetic flux conservation.

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