منابع مشابه
The galactic dynamo effect due to Parker-shearing instability of magnetic flux tubes
In this paper we investigate the idea of Hanasz & Lesch 1993 that the galactic dynamo effect is due to the Parker instability of magnetic flux tubes. In addition to the former approach, we take into account more general physical conditions in this paper, by incorporating cosmic rays and differential forces due to the axisymmetric differential rotation and the density waves as well. We present t...
متن کاملThe galactic dynamo effect due to Parker - shearing instability of magnetic flux tubes
The galactic dynamo effect due to Parker-shearing instability of magnetic flux tubes II. Numerical simulations and the nonlinear evolution. Abstract. In this paper we continue investigations of the Parker-shearing instability performing numerical simulations of the magnetic flux tube dynamics in the thin flux-tube approximation. We show that evolution of flux tubes resulting from numerical simu...
متن کاملThe galactic dynamo effect due to Parker-shearing instability of magnetic flux tubes II. Numerical simulations and the nonlinear evolution
In this paper we continue investigations of the Parker-shearing instability performing numerical simulations of the magnetic flux tube dynamics in the thin flux-tube approximation. We show that evolution of flux tubes resulting from numerical simulations is very similar to that of linear solutions if the vertical displacements are smaller than the vertical scale height H of the galactic disc. I...
متن کاملThe galactic dynamo effect due to Parker-shearing instability of magnetic flux tubes I. General formalism and the linear approximation
In this paper we investigate the idea of Hanasz & Lesch 1993 that the galactic dynamo effect is due to the Parker instability of magnetic flux tubes. In addition to the former approach,we take into accountmore general physical conditions in this paper, by incorporating cosmic rays and differential forces due to the axisymmetric differential rotation and the density waves as well. We present the...
متن کاملResistive MHD simulations of the Parker instability in galactic disks
Parker instability leads to the formation of tangential discontinuities in a magnetic field and subsequent magnetic reconnection due to a numerical and/or an explicit resistivity. In this paper we investigate the role of the uniform, localized and numerical resistivity on the diffusion of magnetic field lines during the growth phase of Parker instability modes. We propose a new method to quanti...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1993
ISSN: 0074-1809
DOI: 10.1017/s0074180900174509