An Extension of the Theory of Kinematic MHD Models of Collapsing Magnetic Traps to 2.5D with shear flow and to 3D - Astrophysics > Solar and Stellar AstrophysicsReport as inadecuate




An Extension of the Theory of Kinematic MHD Models of Collapsing Magnetic Traps to 2.5D with shear flow and to 3D - Astrophysics > Solar and Stellar Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: Context: During solar flares a large number of charged particles areaccelerated to high energies, but the exact mechanism responsible for this is,so far, still unclear. Acceleration in collapsing magnetic traps is one of themechanisms proposed.Aims: In the present paper we want to extend previous 2D models forcollapsing magnetic traps to 3D models and to 2D models with shear flow.Methods: We use analytic solutions of the kinematic magnetohydrodynamic MHDequations to construct the models. Particle orbits are calculated using theguiding centre approximation.Results: We present a general theoretical framework for constructingkinematic MHD models of collapsing magnetic traps in 3D and in 2D with shearflow. A few illustrative examples of collapsing trap models are presented,together with some preliminary studies of particle orbits. For these exampleorbits, the energy increases roughly by a factor of 5 or 6, which is consistentwith the energy increase found in previous 2D models.



Author: Keith J. Grady, Thomas Neukirch

Source: https://arxiv.org/







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