Abstract
The recent progress in the understanding the physical nature of neutron stars (NSs) and the first observational evidence of a genuinely short gamma-ray burst (GRB), GRB 090227B, allow to give an estimate of the gravitational waves versus the X and gamma-rays emission in a short GRB. NS binaries represent good candidates for the detection of gravitational waves emitted during the spiraling-in and final merging phase of the system that leads to the short GRB emission. The data analysis of the GRB 090227B by Muccino et al. (2013) have been shown to be consistent with a NS binary progenitor with masses \(M_{1} = M_{2} = 1.34\,\mathrm{M}_{\odot }\), radii \(R_{1} = R_{2} = 12.2\) km, and a crust thickness Δ r ≈ 0. 47 km, obtained from the new mass-radius relation by Belvedere et al. (2012) of NSs fulfilling global charge neutrality. Muccino et al. (2013) estimated that GRB 090227B is located at redshift z ≈ 1. 6, corresponding to a luminosity distance d L ≈ 12. 2 Gpc. We assess the detectability of this source by the Advanced LIGO interferometer computing the signal-to-noise ratio (SNR) averaged over all polarizations and possible positions of the source with respect to the interferometer. We simulate the dynamics of the binary up to the contact point using the effective one-body formalism (EOB) in the fourth post-Newtonian approximation. We find that the gravitational waves signal would have been produced an SNR = 0.32 for a redshift z = 1. 61. We find that, instead, this GRB would have been detected with an SNR = 8 if it would have been located at a redshift z ≈ 0. 05, or d L ≈ 200 Mpc.
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Acknowledgements
F.G. Oliveira acknowledges the support given by the International Relativistic Astrophysics Erasmus Mundus Joint Doctorate Program under the Grant 2012-1710 from EACEA of the European Commission.
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Oliveira, F.G., Rueda, J.A., Ruffini, R. (2015). X, Gamma-Rays, and Gravitational Waves Emission in a Short Gamma-Ray Burst. In: Sopuerta, C. (eds) Gravitational Wave Astrophysics. Astrophysics and Space Science Proceedings, vol 40. Springer, Cham. https://doi.org/10.1007/978-3-319-10488-1_4
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DOI: https://doi.org/10.1007/978-3-319-10488-1_4
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