Acceleration and Emission Mechanism for Wisps in the Crab Nebula

A new acceleration and emission mechanism is presented for wisps in the crab nebula. It is suggested that the energy of ultra-relativistic electrons comes mainly from Langmuir wave turbulence acceleration and synchrotron absorption acceleration, then they give rise to synchrotron emission. Langmuir wave turbulence acceleration is the dominant mechanism at ε ≤ ε_* , while synchrotron absorption acceleration is more important at ε > ε_*. The energy diffusion equation is investigated for ultra-relativistic electrons undergoing different acceleration and derive power-law solution. In wisp 1 region, the synchrotron emission spectra are obtained, and they are x-rays, optical but not radio. The results are consistent with observations.