Generation of large-scale magnetic fields in spiral galaxiesстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Авторы:
Baryshnikova I.,
Shukurov A.,
Ruzmaikin A.,
Sokoloff D.D.
Аннотация:The authors discuss the origin of bisymmetric and ring-like large-scale magnetic structures in spiral galaxies. They develop further the idea that bisymmetric structures observed in several galaxies are the result of the generation of non-axisymmetric large-scale magnetic fields by the turbulent dynamo mechanism. Observations indicate the ring-like magnetic structure in M31 and the bisymmetric one in M51. The situation in the Milky Way is more complicated. Our galaxy's rotation is such that a non-axisymmetric magnetic field can only be generated here if the half-thickness of the ionized gaseous disc in the solar vicinity lies between 540 and 720 pc. Otherwise only axisymmetric fields are generated. Unfortunately, observations allow a much wider range of possible disc half-thicknesses, ranging from 400 to 1000 pc. The authors propose some observational tests for verification of their theory.