Magnetic-reconnection and current-sheet model for the radio Arc and threads in the galactic center

We propose a new mechanism to explain the radio arc and threads in the Galactic center by current sheets produced by local magnetic shears due to the interaction of a moving cloud and a vertical field based on three-dimensional magnetohydrodynamical simulations. Magnetic reconnection and acceleration of cosmic-ray electrons in the current sheet would result in a high contrast of the radio emissivity inside and outside the arc and threads.