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Journal Paper

전체
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral SCI
  • B. P. Abbott;R. Abbott;T. D. Abbott;F. Acernese;K. Ackley;C. Adams;T. Adams;P. Addesso;R. X. Adhikari;V. B. Adya;C. Affeldt;M. Afrough;B. Agarwal;M. Agathos;K. Agatsuma;N. Aggarwal;O. D. Aguiar;L. Aiello;A. Ain;P. Ajith;B. Allen;G. Allen;A. Allocca;P. A. Altin;A. Amato;A. Ananyeva;S. B. Anderson;W. G. Anderson;S. V. Angelova;S. Antier;Chunglee Kim;J. Zweizig
  • 2017-10-20
  • PHYSICAL REVIEW LETTERS 119 16 : 161101-1~161101-18
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 8.0×10 4 years. We infer the component masses of the binary to be between 0.86 and 2.26 M⊙, 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⊙, with the total mass of the system 2.74 +0.04 -0.01M⊙. The source was localized within a sky region of 28 deg2 (90% probability) and had a luminosity distance of 40 +8 -14 Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with the γ-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 γ-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.