ON THE VERY HIGH ENERGY PULSED EMISSION IN THE CRAB PULSAR

We have examined the recently detected very high energy (VHE) pulsed radiation from the Crab pulsar. According to the observational evidence, the emission (>25 GeV) peaks at the same phase as the optical spectrum. By considering the cyclotron instability, we show that the pitch angles become non-vanishing, leading to the efficient synchrotron mechanism near the light cylinder surface. We argue that the inverse Compton scattering and the curvature radiation mechanisms do not contribute to the VHE domain detected by MAGIC.