Modelling magnetically deformed neutron stars

Details Modelling magnetically deformed neutron stars Modelling magnetically deformed neutron stars

2007-05-12

arxiv.org/abs/0705.1780v1

Mon.Not.Roy.Astron.Soc.385:531-542,2008

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1111/j.1365-2966.2008.12861.x

Rotating deformed neutron stars are important potential sources for groundbased gravitational-wave interferometers such as LIGO, GE0600 and VIRGO. One mechanism that may lead to significant non-asymmetries is the internal magnetic field. It is well known that a magnetic star will not be spherical and, if the magnetic axis is not aligned with the spin axis, the deformation will lead to the emission of gravitational waves. The aim of this paper is to develop a formalism that would allow us to model magnetically deformed stars, using both realistic equations of state and field configurations. As a first step, we consider a set of simplified model problems. Focusing on dipolar fields, we determine the internal magnetic field which is consistent with a given neutron star model. We then calculate the associated deformation. We conclude by discussing the relevance of our results for current gravitational-wave detectors and future prospects.

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