Détail de la notice
Titre du Document
Quadrupole Moments of Rotating Neutron Stars
Auteur(s)
LAARAKKERS William G. ; POISSON Eric
Résumé
Numerical models of rotating neutron stars are constructed for four equations of state using the computer code RNS written by Stergioulas. For five selected values of the star's gravitational mass (in the interval between 1.0 and 1.8 solar masses) and for each equation of state, the star's angular momentum is varied from J=0 to the Keplerian limit J=Jmax. For each neutron star configuration, we compute Q, the quadrupole moment of the mass distribution. We show that for given values of M and J, |Q| increases with the stiffness of the equation of state. For fixed mass and equation of state, the dependence on J is well reproduced with a simple quadratic fit, Q≃−aJ2/Mc2, where c is the speed of light and a is a parameter of order unity depending on the mass and the equation of state.
Editeur
IOP
Identifiant
ISSN : 0004-637X CODEN : ASJOAB
Source
The Astrophysical journal A. 1999, vol. 512, n° 1, pp. 282-287
Langue
Anglais
Copyright
Copyright 1999 American Institute of Physics. All rights reserved.