Resistive relativistic magnetohydrodynamics from a charged multi-fluids perspective

Details Resistive relativistic magnetohydrodynamics from a charged multi-fluids perspective Resistive relativistic magnetohydrodynamics from a charged multi-fluids perspective

2012-04-12

arxiv.org/abs/1204.2695v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

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Scientific paper

We consider general relativistic magnetohydrodynamics from a charged multifluids point-of-view, taking a variational approach as our starting point. We develop the case of two charged components in detail, accounting for a phenomenological resistivity, providing specific examples for pair plasmas and proton-electron systems. We discuss both cold, low velocity, plasmas and hot systems where we account for a dynamical entropy component. The results for the cold case (which accord with recent work in the literature) provide a complete model for resistive relativistic magnetohydrodynamics, clarifying the assumptions that lead to various models that have been used in astrophysical applications. The analysis of the hot case is (as far as we are aware) novel, accounting for the relaxation times that are required to ensure causality and demonstrating the explicit coupling between fluxes of heat and charge.

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