Magnetocentrifugal acceleration of bulk motion of plasma in pulsar magnetosphere

Abstract

Acceleration of bulk motion of plasma due to magneto centrifugal mechanism is investigated for different shapes of the field lines of 3-D magnetic field. It is shown that this mechanism can be efficient provided that the field line is twisted into direction of rotation. According to the last results of the numerical modelling a fraction of the field lines with such geometrical shape apparently exist in the pulsar magnetosphere close to the last closed field line. In this case the Lorentz factor $\gamma$ increases with the radius $r$ along these field lines as $\gamma \sim (1-(r\Omega /c{)}^2{)}^{-1}$, where $\Omega$ - angular velocity of the pulsar rotation. The magneto centrifugal mechanism provides acceleration of the electrons to the energy which is sufficient to explain the observed VHE pulsed $\gamma$-rays from Crab pulsar.

8 pages, 6 figures, submitted for MNRAS

References in corpus (4)

• Three-dimensional numerical simulations of the pulsar magentoshere: Preliminary results
• Self-Similar Force-Free Wind From an Accretion Disk
• Does a strong particle accelerator arise very close to the light cylinder in a pulsar magnetosphere?
• The pulsar synchrotron: coherent radio emission

Cited by in corpus (7)

• Theory of pulsar magnetosphere and wind
• Pulsed VHE emission from the Crab Pulsar in the context of magnetocentrifugal particle acceleration
• Magnetic absorption of VHE photons in the magnetosphere of the Crab pulsar
• First Adiabatic Invariant and the Brightness Temperature of Relativistic Jets
• Rotationally-driven VHE emission from the Vela pulsar
• Probing the properties of the pulsar wind via studying the dispersive effects in the pulses from the pulsar companion in a double neutron-star binary system
• On the angular anisotropy of the distribution function of radiating particles in relativistic jets