Accurate evolutions of inspiralling and magnetized neutron stars: Equal-mass binaries

Bruno Giacomazzo, Luciano Rezzolla, and Luca Baiotti
Phys. Rev. D 83, 044014 – Published 4 February 2011

Abstract

By performing new, long and numerically accurate general-relativistic simulations of magnetized, equal-mass neutron-star binaries, we investigate the role that realistic magnetic fields may have in the evolution of these systems. In particular, we study the evolution of the magnetic fields and show that they can influence the survival of the hypermassive neutron star produced at the merger by accelerating its collapse to a black hole. We also provide evidence that, even if purely poloidal initially, the magnetic fields produced in the tori surrounding the black hole have toroidal and poloidal components of equivalent strength. When estimating the possibility that magnetic fields could have an impact on the gravitational-wave signals emitted by these systems either during the inspiral or after the merger, we conclude that for realistic magnetic-field strengths B1012G such effects could be detected, but only marginally, by detectors such as advanced LIGO or advanced Virgo. However, magnetically induced modifications could become detectable in the case of small-mass binaries and with the development of gravitational-wave detectors, such as the Einstein Telescope, with much higher sensitivities at frequencies larger than 2kHz.

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  • Received 13 September 2010

DOI:https://doi.org/10.1103/PhysRevD.83.044014

© 2011 American Physical Society

Authors & Affiliations

Bruno Giacomazzo1,2,3, Luciano Rezzolla3,4, and Luca Baiotti5

  • 1Department of Astronomy, University of Maryland, College Park, Maryland, USA
  • 2Gravitational Astrophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
  • 3Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Potsdam, Germany
  • 4Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana, USA
  • 5Institute of Laser Engineering, Osaka University, Osaka, Japan

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Issue

Vol. 83, Iss. 4 — 15 February 2011

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