The magnetic field generated by sources
inside and outside the star

E. Gerth
D-14471 Potsdam, Gontardstr 130, Germany.
e-mail: ewald-gerth@t-online.de
Yu.V. Glagolevskij, Special Astrophysical Observatory of Russian AS, Nizhnij Arkhyz 369167, Russia.
e-mail: glagol@sao.ru

Preliminary abstract
The ubiquitously in universe present magnetic fields reveal themselves only by physical interaction with the interspersed material, especially by the Faraday and the Zeeman effects. The magneto-sensitive atmosphere of a star is an ideal detector of the magnetic field penetrating the atmosphere layer - indifferently from which side. Hitherto the origin of the magnetic field of a star was sought for mainly in its interior, neglecting the possibility of externally caused influence. It should not be denied, however, that most magnetic stars possess their own magnetic moment. The detection of a field depends, of course, on its power. Therefore, only nearby powerful magnetic sources may influence recognizable the atmosphere of a star with a sufficiently large surface. One could think of a binary system consisting of a nonmagnetic giant with a magnetic dwarf companion. Scholz and Gerth assume, for instance, that the supergiant nu Cep, which can not possess an own magnetic moment for physical reasons, could be a candidate for such an externally magnetically influenced ''magnetic star''. But also other possibilities of external magnetic sources should be taken into consideration, such as close and cataclysmic binary systems with mutual influence. We demonstrate on the poster shown at this conference only the principal possibilities and relate to the advantages of the theoretical, mathematical and numerical treatment of the construction of magnetic fields by sources and vortices.
(This is a summary of a poster presented by E. Gerth at the CP#AP WORKSHOP in Vienna, Austria, 10.-14. September 2007)
www.univie.ac.at/cpworkshop2007/poster.html

P 121. Gerth E., Glagolevskij Yu.V.:
The magnetic field generated by sources inside and outside the star
2004, Submitted to Conference Volume of CP#AP Workshop,
University Vienna, Austria, 10.-14. September 2007
Preliminary abstract
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