研究成果藝廊

Distribution of the physical quantities along the jet propagation axis. We perform special relativistic MHD simulations in a cylindrical 1.5-dimensional pproximation. Our model reproduces a paired super/subluminal knot motions, taken by the HST observations (Biretta et al. 1999), as a quad RMHD shock system. By assuming a viewing angle of 14$^{\circ$ (Wang \& Zhou 2009), observed apparent speeds 6 $c$ and 0.84 $c$ correspond to $\sim$ 0.99 $c$ and 0.80 $c$, respectively. In our model, these knots are identified as the forward/reverse fast mode MHD shocks (FF/RF in the figure). By the nature of a slow mode MHD shock, it may not be appropriated to mediate a diffusive shock acceleration of high energy particles.