Supernova-driven interstellar turbulence and the galactic dynamo

Дата и время публикации : 2011-01-20T17:29:52Z

Авторы публикации и институты :
Oliver Gressel
Detlef Elstner
Günther Rüdiger

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 7 pages, 2 figures, conference proceedings of the IAU Symposium 274, Advances in Plasma Astrophysics
Первичная категория: astro-ph.GA

Все категории : astro-ph.GA

Краткий обзор статьи: The fractal shape and multi-component nature of the interstellar medium together with its vast range of dynamical scales provides one of the great challenges in theoretical and numerical astrophysics. Here we will review recent progress in the direct modelling of interstellar hydromagnetic turbulence, focusing on the role of energy injection by supernova explosions. The implications for dynamo theory will be discussed in the context of the mean-field approach. Results obtained with the test field-method are confronted with analytical predictions and estimates from quasilinear theory. The simulation results enforce the classical understanding of a turbulent Galactic dynamo and, more importantly, yield new quantitative insights. The derived scaling relations enable confident global mean-field modelling.

Category: Physics