Magnetized Neutron Star Mergers and Gravitational Wave Signals - INSPIRE

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Magnetized Neutron Star Mergers and Gravitational Wave Signals

Jan, 2008

4 pages

Published in:

Phys.Rev.Lett. 100 (2008) 191101

e-Print:

0801.4387 [gr-qc]

DOI:

10.1103/PhysRevLett.100.191101

View in:

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Abstract: (arXiv)

We investigate the influence of magnetic fields upon the dynamics of and resulting gravitational waves from a binary neutron star merger in full general relativity coupled to ideal magnetohydrodynamics (MHD). We consider two merger scenarios, one where the stars begin with initially aligned poloidal magnetic fields and one with no magnetic field. Both mergers result in a strongly differentially rotating object. In comparison to the non-magnetized scenario, the aligned magnetic fields delay the final merger of the two stars. During and after merger we observe phenomena driven by the magnetic field, including Kelvin-Helmholtz instabilities in shear layers, winding of the field lines, and transition from poloidal to toroidal fields. These effects not only produce electromagnetic radiation, but also can have a strong influence on the gravitational waves. Thus, there are promising prospects for studying such systems with both types of waves.

Note:

Replaced with accepted PRL version. (Figures have been reduced in quality)

04.25.dk
04.30.Db
general relativity
gravitational waves
neutron stars
stellar magnetism
neutron star: binary
neutron star: magnetic
gravitational radiation
magnetic field

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