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.

arXiv comment8 pages, 6 figures, submitted for MNRAS

References in corpus (14)

• Time-dependent force-free pulsar magnetospheres: axisymmetric and oblique rotators
• The Axisymmetric Pulsar Magnetosphere
• On the force-free magnetosphere of aligned rotator
• Simulations of Axisymmetric Magnetospheres of Neutron Stars
• Detection of Pulsed Gamma Rays Above 100 GeV from the Crab Pulsar
• The Power of Axisymmetric Pulsar
• Three-dimensional numerical simulations of the pulsar magentoshere: Preliminary results
• Time-Dependent 3D Magnetohydrodynamic Pulsar Magnetospheres: Oblique Rotators
• Phase-resolved energy spectra of the Crab Pulsar in the range of 50-400 GeV measured with the MAGIC Telescopes
• Self-Similar Force-Free Wind From an Accretion Disk
• Magnetocentrifugal acceleration of plasma in a nonaxisymmetric magnetosphere
• On the origin of sub-TeV gamma-ray pulsed emission from rotating neutron stars
• Does a strong particle accelerator arise very close to the light cylinder in a pulsar magnetosphere?
• The pulsar synchrotron: coherent radio emission

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• Pulsed VHE emission from the Crab Pulsar in the context of magnetocentrifugal particle acceleration
• Observation of the Black Widow B1957+20 millisecond pulsar binary system with the MAGIC telescopes
• First Adiabatic Invariant and the Brightness Temperature of Relativistic Jets
• Magnetic absorption of VHE photons in the magnetosphere of the Crab pulsar
• Two-fluid model of the pulsar magnetosphere represented as an axisymmetric force-free dipole
• Rotationally-driven VHE emission from the Vela pulsar
• On the angular anisotropy of the distribution function of radiating particles in relativistic jets
• 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