Galactic winds and the symmetry properties of galactic magnetic fieldsстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Context. Contemporary studies of the symmetry properties of galactic magnetic fields contain two contradictory ideas. There are observational and theoretical hints that large-scale magnetic fields are symmetric with respect to the galactic plane in the disc, and antisymmetric in the halo. On the other hand, standard galactic dynamo models without a galactic wind give symmetric or antisymmetric configurations in both disc and halo regions simultaneously.
Aims: Here we explore the role of a galactic wind in resolving this dichotomy.
Methods: The key idea is that a galactic wind must be be taken into account in order to resolve the problem. We perform a search of the parameter space of galactic dynamo models containing such winds.
Results: By including a galactic wind, magnetic configurations of such symmetry, i.e. approximately even in the disc and odd in the halo, can be obtained. We note that a variety of other solutions can also be found.
Conclusions: A galactic wind plays a significant role in determining the structure of galactic magnetic configurations and should be included in future modelling.