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We construct general relativistic models of stationary, strongly magnetized neutron stars. The magnetic field configuration, obtained by solving the relativistic Grad-Shafranov equation, is a generalization of the twisted torus model recently proposed in the literature; the stellar deformations induced by the magnetic field are computed by solving the perturbed Einstein's equations; stellar matter is modeled using realistic equations of state. We find that in these configurations the poloidal... Source: http://arxiv.org/abs/1003.2148v3

Neutron stars can have, in some phases of their life, extremely strong magnetic fields, up to 10^15-10^16 G. These objects, named magnetars, could be powerful sources of gravitational waves, since their magnetic field could determine large deformations. We discuss the structure of the magnetic field of magnetars, and the deformation induced by this field. Finally, we discuss the perspective of detection of the gravitational waves emitted by these stars. Source: http://arxiv.org/abs/1011.2778v1

We find general relativistic solutions of equilibrium magnetic field configurations in magnetars, extending previous results of Colaiuda et al. (2008). Our method is based on the solution of the relativistic Grad-Shafranov equation, to which Maxwell's equations can be reduced in some limit. We obtain equilibrium solutions with the toroidal magnetic field component confined into a finite region inside the star, and the poloidal component extending to the exterior. These so-called twisted-torus... Source: http://arxiv.org/abs/0903.0556v2

byG. Ghirlanda; O. S. Salafia; A. Pescalli; G. Ghisellini; R. Salvaterra; E. Chassande-Mottin; M. Colpi; F. Nappo; P. D'Avanzo; A. Melandri; M. G. Bernardini; M. Branchesi; S. Campana; R. Ciolfi; S. Covino; D. Gotz; S. D. Vergani; M. Zennaro; G. Tagliaferri

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We derive the luminosity function and redshift distribution of short Gamma Ray Bursts (SGRBs) using (i) all the available observer-frame constraints (i.e. peak flux, fluence, peak energy and duration distributions) of the large population of Fermi SGRBs and (ii) the rest-frame properties of a complete sample of Swift SGRBs. We show that a steep $\phi(L)\propto L^{-a}$ with a>2.0 is excluded if the full set of constraints is considered. We implement a Monte Carlo Markov Chain method to derive... Topics: Astrophysics, High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology Source: http://arxiv.org/abs/1607.07875