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Przeglądanie wg autora "Lesch, Harald"
Wyświetlono pozycje 1-8 z 8
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Hanasz, Michał; Kowal, Grzegorz; Otmianowska-Mazur, Katarzyna; Lesch, Harald (2004-02-27)We present the first numerical model of the magnetohydrodynamical cosmic-ray (CR) driven dynamo of the type proposed by Parker (1992). The driving force of the amplification process comes from CRs injected into the galactic ...
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Hanasz, Michał; Lesch, Harald (2003-03-27)We investigate favourable circumstances for fast magnetic reconnection in astrophysical plasmas based on recent results by Rogers et al. (2001). Given that a critical magnetic field structure with antiparallel field lines ...
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Hanasz, Michał; Otmianowska-Mazur, Katarzyna; Lesch, Harald; Kowal, Grzegorz; Soida, Marian; Wóltański, Dominik; Kowalik, Kacper; Pawłaszek, Rafał; Kulesza-Żydzik, Barbara (2008-12-31)We present new developments on the Cosmic--Ray driven, galactic dynamo, modeled by means of direct, resistive CR--MHD simulations, performed with ZEUS and PIERNIK codes. The dynamo action, leading to the amplification of ...
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Hanasz, Michał; Otmianowska-Mazur, Katarzyna; Kowal, Grzegorz; Lesch, Harald (2008-12-19)We present a parameter study of the magnetohydrodynamical dynamo driven by cosmic rays in the interstellar medium (ISM) focusing on the efficiency of magnetic field amplification and the issue of energy equipartition between ...
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Hanasz, Michał; Lesch, Harald (2003-09-24)We present a numerical algorithm for the incorporation of the active cosmic ray transport, into the ZEUS-3D magnetohydrodynamical code. The cosmic ray transport is described by the diffusion-advection equation. The applied ...
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Lesch, Harald; Hanasz, Michał (2003-02-08)We present a scenario for efficient magnetization of very young galaxies about 0.5 Gigayears after the Big-Bang by a cosmic ray-driven dynamo. These objects experience a phase of strong star formation during this first ...
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Hanasz, Michał; Lesch, Harald (1997-12-16)We present a new fast dynamo model for galactic magnetic fields, which is based on the Parker-shearing instability and magnetic reconnection, in the spirit of the model proposed by Parker (1992). We introduce a new scenario ...
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Hanasz, Michał; Lesch, Harald (1997-11-23)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 ...
Wyświetlono pozycje 1-8 z 8
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