General Relativistic Effect of Gravitomagnetic Charge on Pulsar Magnetosphere and Particle Acceleration in a Polar Cap
arXiv:0806.2376 · doi:10.1086/590322
Abstract
We study magnetospheric structure surrounding rotating magnetized neutron star with nonvanishing NUT (Newman-Tamburino-Unti) parameter. For the simplicity of calculations Goldreich-Julian charge density is analyzed for the aligned neutron star with zero inclination between magnetic field, gravitomagnetic field and rotation axis. From the system of Maxwell equations in spacetime of slowly rotating NUT star, second-order differential equation for electrostatic potential is derived. Analytical solution of this equation indicates the general relativistic modification of an accelerating electric field and charge density along the open field lines by the gravitomagnetic charge. The implication of this effect to the magnetospheric energy loss problem is underlined. In the second part of the paper we derive the equations of motion of test particles in magnetosphere of slowly rotating NUT star. Then we analyze particle motion in the polar cap and show that NUT parameter can significantly change conditions for particle acceleration.
arXiv comment21 pages, 6 figures, accepted for publication in ApJ
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Cited by in corpus (14)
- Shadow of Kerr-Taub-NUT black hole
- Theory of pulsar magnetosphere and wind
- Penrose Process in Kerr-Taub-NUT Spacetime
- Acceleration of particles by black hole with gravitomagnetic charge immersed in magnetic field
- General-relativistic force-free pulsar magnetospheres
- Electromagnetic fields of slowly rotating magnetized compact stars in conformal gravity
- General Relativistic Magnetospheres of Slowly Rotating and Oscillating Magnetized Neutron Stars
- Kerr-Taub-NUT spacetime to explain the jet power and the radiative efficiency of astrophysical black holes
- Particle acceleration in the polar cap region of an oscillating neutron star
- Plasma Magnetosphere of Rotating Magnetized Neutron Star in the Braneworld
- Electromagnetic Fields of Slowly Rotating Compact Magnetized Stars in Braneworld
- External Electromagnetic Fields of a Slowly Rotating Magnetized Star with Gravitomagnetic Charge
- Spin Down of Rotating Compact Magnetized Strange Stars in General Relativity
- Spindown of magnetars: Quantum Vacuum Friction?