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Enhancement of Magnetic Fields in High-Gravity Stars Due to an Intrinsic Dynamo Effect

Published online by Cambridge University Press:  19 July 2016

Dieter Engelhardt  and
Irmela Bues
Dieter Engelhardt
Affiliation:
Remeis Sternwarte, D-8600 Bamberg, Federal Republic of Germany
Irmela Bues
Affiliation:
Remeis Sternwarte, D-8600 Bamberg, Federal Republic of Germany

Abstract

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A model of a local magnetic field within a white dwarf is constructed by the use of quantum statistics. The polarized Fermi, Bose and Maxwell statistics is calculated within a Heisenberg magnetism model by the use of Jones calculus. With a mesoscopic description the quantum mechanical dynamo can be discussed. The result is an efficient excitation mechanism, based on Lorentz time transformations and magnetic interactions. An Ap star as progenitor of a polarized white dwarf may loose its field and can generate a stronger one due to an intrinsic dynamo on a time scale of 107 years.

Type
4. Late-Type and Other Stars
Information
Symposium - International Astronomical Union , Volume 157: The Cosmic Dynamo , 1993 , pp. 177 - 181
Copyright
Copyright © Kluwer 1993 

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