On the universality of I-Love-Q relations in magnetized neutron stars

Haskell, B., Ciolfi, R., Pannarale, Francesco ORCID: https://orcid.org/0000-0002-7537-3210 and Rezzolla, L. 2014. On the universality of I-Love-Q relations in magnetized neutron stars. Monthly Notices of the Royal Astronomical Society: Letters 438 (1) , L71-L75. 10.1093/mnrasl/slt161

Full text not available from this repository.

Abstract

Recently, general relations among the quadrupole moment (Q), the moment of inertia (I) and the tidal deformability (Love number) of a neutron star were shown to exist. They are nearly independent of the nuclear matter equation of state and would be of great aid in extracting parameters from observed gravitational waves and in testing general relativity. These relations, however, do not account for strong magnetic fields. We consider this problem by studying the effect of a strong magnetic field on slowly rotating relativistic neutron stars and show that, for simple magnetic field configurations that are purely poloidal or purely toroidal, the relation between Q and I is again nearly universal. However, different magnetic field geometries lead to different I–Q relations, and, in the case of a more realistic twisted-torus magnetic field configuration, the relation depends significantly on the equation of state, losing its universality. I–Love–Q relations must thus be used with very great care, since universality is lost for stars with long spin periods, i.e. P ≳ 10 s, and strong magnetic fields, i.e. B ≳ 1012 G.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	gravitational waves; magnetic fields; MHD; binaries: general; stars: neutron
Additional Information:	Online publication date: 13 December 2013.
Publisher:	Oxford University Press
ISSN:	1745-3933
Date of Acceptance:	8 November 2013
Last Modified:	25 Oct 2022 08:38
URI:	https://orca.cardiff.ac.uk/id/eprint/53803

Citation Data

Cited 74 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item