  Analogue black holes in non-Riemannian effective spacetime of moving vortical
plasmas described by moving magnetohydrodynamic (MHD) flows. This example is an
extension of acoustic torsion recently introduced in the literature (Garcia de
Andrade,PRD(2004),7,64004), where now the presence of artificial black holes in
moving plasmas is obtained by the presence of an horizon in the non-Riemannian
spacetime. Hawking radiation is computed in terms of the background magnetic
field and the magnetic permeability. The metric is singular although Cartan
analogue torsion is not necessarily singular. The effective Lorentz invariance
is shown to be broken due to the presence of effective torsion in strong
analogy with the Riemann-Cartan gravitational case presented recently by
Kostelecky (PRD 69,2004,105009).
