Movatterモバイル変換

• Abbott, B. P.
;
• Abbott, R.
;
• Abbott, T. D.
;
• Acernese, F.
;
• Ackley, K.
;
• Adams, C.
;
• Adams, T.
;
• Addesso, P.
;
• Adhikari, R. X.
;
• Adya, V. B.
;
• Affeldt, C.
;
• Afrough, M.
;
• Agarwal, B.
;
• Agathos, M.
;
• Agatsuma, K.
;
• Aggarwal, N.
;
• Aguiar, O. D.
;
• Aiello, L.
;
• Ain, A.
;
• Ajith, P.
;
• Allen, B.
;
• Allen, G.
;
• Allocca, A.
;
• Altin, P. A.
;
• Amato, A.
;
• Ananyeva, A.
;
• Anderson, S. B.
;
• Anderson, W. G.
;
• Angelova, S. V.
;
• Antier, S.
;
• Appert, S.
;
• Arai, K.
;
• Araya, M. C.
;
• Areeda, J. S.
;
• Arnaud, N.
;
• Arun, K. G.
;
• Ascenzi, S.
;
• Ashton, G.
;
• Ast, M.
;
• Aston, S. M.
;
• Astone, P.
;
• Atallah, D. V.
;
• Aufmuth, P.
;
• Aulbert, C.
;
• AultONeal, K.
;
• Austin, C.
;
• Avila-Alvarez, A.
;
• Babak, S.
;
• Bacon, P.
;
• Bader, M. K. M.
• and 1076 more

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 per8.0×104years. We infer the component masses of the binary to be between 0.86 and2.26M⊙, 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 range1.17─1.60M⊙, with the total mass of the system2.74-0.01+0.04M⊙. The source was localized within a sky region of28deg2 (90% probability) and had a luminosity distance of40-14+8Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with theγ-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 shortγ-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.

Graphics

Click to view more