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

Giacomazzo, B., Rezzolla, L., & Baiotti, L. (2011). Accurate evolutions of inspiralling and magnetized neutron-stars: equal-mass binaries. Physical Review D, 83(4): 044014. doi:10.1103/PhysRevD.83.044014.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-1065-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-1066-B
Genre: Journal Article

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1009.2468 (Preprint), 2MB
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 Creators:
Giacomazzo, Bruno1, Author              
Rezzolla, Luciano1, Author              
Baiotti, Luca, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 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 B<~1e12 G 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 ~2 kHz.

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 Dates: 2010-09-132011-02-102011
 Publication Status: Published in print
 Pages: 18 pages, 10 figures. Added two new figures (figures 1 and 7). Small modifications to the text to match the version published on Phys. Rev. D
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 Identifiers: arXiv: 1009.2468
DOI: 10.1103/PhysRevD.83.044014
URI: http://arxiv.org/abs/1009.2468
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : Published for the American Physical Society by the American Institute of Physics
Pages: - Volume / Issue: 83 (4) Sequence Number: 044014 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258