Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-02-18
Astronomy and Astrophysics
Astrophysics
10 pages, 6figures, accepted for publication in PASJ
Scientific paper
We study the magnetic interaction between a neutron star and its disk by solving the time-dependent relativistic force-free equations. At the initial state, we assume that the dipole magnetic field of the neutron star connects the neutron star and its equatorial disk, which deeply enters into the magnetosphere of the neutron star. Magnetic fields are assumed to be frozen to the star and the disk. The rotation of the neutron star and the disk is imposed as boundary conditions. We apply Harten-Lax-van Leer (HLL) method to simulate the evolution of the star-disk system. We carry out simulations for (1) a disk inside the corotation radius, in which the disk rotates faster than the star, and (2) a disk outside the corotation radius, in which the neutron star rotates faster than the disk. Numerical results indicate that for both models, the magnetic field lines connecting the disk and the star inflate as they are twisted by the differential rotation between the disk and the star. When the twist angle exceeds pi radian, the magnetic field lines expand with speed close to the light speed. This mechanism can be the origin of relativistic outflows observed in binaries containing a neutron star.
Asano Eiji
Matsumoto Ryoji
Uchida Toshio
No associations
LandOfFree
Time Evolution of Relativistic Force-Free Fields Connecting a Neutron Star and its Disk does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Time Evolution of Relativistic Force-Free Fields Connecting a Neutron Star and its Disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time Evolution of Relativistic Force-Free Fields Connecting a Neutron Star and its Disk will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-387287