Abstract We study the linear stability of a planar interface separating two fluids in relative motion, focusing on symmetric configuration where have same properties (density, temperature, magnetic field strength, and direction). consider most general case with arbitrary sound speed cs, Alfvén vA, orientation. For instability associated fast mode, we find that lower bound unstable shear velocit...

ABSTRACT Magnetic flares create hot relativistic shocks outside the light cylinder radius of a magnetized star. Radio emission produced in such shock or at smaller than undergoes free–free absorption while passing through shocked medium. In this work, we demonstrate that can lead to negative drift frequency-time spectra. Whether it is related downward pattern observed fast radio bursts (FRBs) u...

We demonstrate that the 1D cylindrical version of the Grad-Shafranov equation is more rich than classical self-similar ones, and more suitable for the astrophysical jets we observe. In particular, it allows us to describe the central (and, hence, the most energetic) part of the flow. Both relativistic and non-relativistic versions are discussed. It is shown that taking into account the finite p...

Using fully kinetic simulations, we demonstrate that magnetic reconnection in relativistic plasmas is highly efficient at accelerating particles through a first-order Fermi process resulting from the curvature drift of particles in the direction of the electric field induced by the relativistic flows. This mechanism gives rise to the formation of hard power-law spectra in parameter regimes wher...

With the fundamental stress mechanism of accretion disks identified—correlated MHD turbulence driven by the magneto-rotational instability—it has become possible to make numerical simulations of accretion disk dynamics based on well-understood physics. A sampling of results from both Newtonian 3-d shearing box and general relativistic global disk MHD simulations is reported. Among other things,...

The only justification for the Einstein velocity addition law ‎appeared to be its empirical adequacy‎, ‎so that the ‎intrinsic beauty and harmony in Einstein addition remained for a long time ‎a mystery to be conquered‎. ‎Accordingly‎, ‎the aim of this expository article is to present ‎(i) the Einstein relativistic vector addition‎, ‎(ii) the resulting Einstein scalar multiplication‎, ‎(iii) th...