Magnetic Fields and the r-MODE Instability

Details Magnetic Fields and the r-MODE Instability Magnetic Fields and the r-MODE Instability

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002nmgm.meet.2355r&link_type=abstract

"THE NINTH MARCEL GROSSMANN MEETING On Recent Developments in Theoretical and Experimental General Relativity, Gravitation and R

Physics

Scientific paper

The instability of r-mode oscillations in rapidly rotating neutron stars has attracted attention as a potential mechanism for producing high frequency, almost periodic gravitational waves. The analyses carried so far have shown the existence of these modes and have considered damping by shear and bulk viscosity. However, the magnetohydrodynamic coupling of the modes with a stellar magnetic field and its role in the damping of the instability has not been fully investigated yet. In this talk I discuss the existence of secular higher-order kinematical effects which will produce toroidal fluid drifts. These will generate toroidal magnetic fields from any dipolar magnetic field pre-existing on the neutron and could have a strong impact on the evolution of the instability.

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