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  Maximum gravitational-wave energy emissible in magnetar flares

Corsi, A., & Owen, B. J. (2011). Maximum gravitational-wave energy emissible in magnetar flares. Physical Review D, 83(10): 104014. doi:10.1103/PhysRevD.83.104014.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-0871-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-0872-C
Genre: Journal Article

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 Creators:
Corsi, Alessandra, Author
Owen, Benjamin J.1, Author              
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: Recent searches of gravitational-wave (GW) data raise the question of what maximum GW energies could be emitted during gamma-ray flares of highly magnetized neutron stars (magnetars). The highest energies (\sim 10^{49} erg) predicted so far come from a model [K. Ioka, Mon. Not. Roy. Astron. Soc. 327, 639 (2001)] in which the internal magnetic field of a magnetar experiences a global reconfiguration, changing the hydromagnetic equilibrium structure of the star and tapping the gravitational potential energy without changing the magnetic potential energy. The largest energies in this model assume very special conditions, including a large change in moment of inertia (which was observed in at most one flare), a very high internal magnetic field, and a very soft equation of state. Here we show that energies of 10^{48}-10^{49} erg are possible under more generic conditions by tapping the magnetic energy, and we note that similar energies may also be available through cracking of exotic solid cores. Current observational limits on gravitational waves from magnetar fundamental modes are just reaching these energies and will beat them in the era of advanced interferometers.

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 Dates: 2011-02-162011
 Publication Status: Published in print
 Pages: 16 pages, 5 figures, 1 table
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1102.3421
DOI: 10.1103/PhysRevD.83.104014
URI: http://arxiv.org/abs/1102.3421
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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 (10) Sequence Number: 104014 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258