GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
PBN-AR
Instytucja
Centrum Astronomiczne im. Mikołaja Kopernika Polskiej Akademii Nauk
Źródłowe zdarzenia ewaluacyjne
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
PHYSICAL REVIEW LETTERS (45pkt w roku publikacji)
ISSN
0031-9007
EISSN
1079-7114
Wydawca
AMER PHYSICAL SOC
DOI
URL
Rok publikacji
2017
Numer zeszytu
16
Strony od-do
161101
Numer tomu
119
Identyfikator DOI
Liczba arkuszy
Autorzy
(liczba autorów: 1126)
Słowa kluczowe
EN
General Relativity and Quantum Cosmology
Astrophysics - High Energy Astrophysical Phenomena
Streszczenia
Język
EN
Treść
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<SUP>4</SUP> years . We infer the component masses of the binary to be between 0.86 and 2.26 M<SUB>☉</SUB> , 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<SUB>☉</SUB> , with the total mass of the system 2.7 4<SUB>-0.01</SUB><SUP>+0.04</SUP>M<SUB>☉</SUB> . The source was localized within a sky region of 28 deg<SUP>2</SUP> (90% probability) and had a luminosity distance of 4 0<SUB>-14</SUB><SUP>+8</SUP> 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.
Inne
System-identifier
R3882
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