GW170817: Observation of Gravitational Waves from a Binary Neutron Star
Inspiral

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doi:10.1103/PhysRevLett.119.161101

On August 17, 2017 at 12:41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0 x 10(4) years. We infer the component masses of the binary to be between 0.86 and 2.26 M-circle dot, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17-1.60 M-circle dot, with the total mass of the system 2.74(-0.01)(+0.04) M-circle dot. The source was localized within a sky region of 28 deg(2) (90% probability) and had a luminosity distance of 40(-14)(+8) Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with the gamma-ray burst GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short gamma-ray bursts. Subsequent identification of transient counterparts across the electromagnetic spectrum in the same location further supports the interpretation of this event as a neutron star merger. This unprecedented joint gravitational and electromagnetic observation provides insight into astrophysics, dense matter, gravitation, and cosmology.

GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

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C. and Wittel;H. and Woan;G. and Woehler;J. and Wofford;J. and Wong;K. W. K. and Worden;J. and Wright;J. L. and Wu;D. S. and Wysocki;D. M. and Xiao;S. and Yamamoto;H. and Yancey;C. C. and Yang;L. and Yap;M. J. and Yazback;M. and Yu;Hang and Yu;Haocun and Yvert;M. and Zadrozny;A. and Zanolin;M. and Zelenova;T. and Zendri;J. -.P. and Zevin;M. and Zhang;L. and Zhang;M. and Zhang;T. and Zhang;Y. -.H. and Zhao;C. and Zhou;M. and Zhou;Z. and Zhu;S. J. and Zhu;X. J. and Zimmerman;A. B. and Zucker;M. E. and Zweizig;J. and LIGO Sci Collaboration & Virgo

2017-01-01

Abstract

On August 17, 2017 at 12:41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0 x 10(4) years. We infer the component masses of the binary to be between 0.86 and 2.26 M-circle dot, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17-1.60 M-circle dot, with the total mass of the system 2.74(-0.01)(+0.04) M-circle dot. The source was localized within a sky region of 28 deg(2) (90% probability) and had a luminosity distance of 40(-14)(+8) Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with the gamma-ray burst GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short gamma-ray bursts. Subsequent identification of transient counterparts across the electromagnetic spectrum in the same location further supports the interpretation of this event as a neutron star merger. This unprecedented joint gravitational and electromagnetic observation provides insight into astrophysics, dense matter, gravitation, and cosmology.

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				2017
			
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				PHYSICAL REVIEW LETTERS
			
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				https://dx.doi.org/10.1103/PhysRevLett.119.161101
			
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				262
			
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/405196

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GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

2017-01-01

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