scholarly journals Bayesian Inference for Gravitational Waves from Binary Neutron Star Mergers in Third Generation Observatories

2021 ◽  
Vol 127 (8) ◽  
Author(s):  
Rory Smith ◽  
Ssohrab Borhanian ◽  
Bangalore Sathyaprakash ◽  
Francisco Hernandez Vivanco ◽  
Scott E. Field ◽  
...  
Keyword(s):  
Bayesian Inference ◽  
Neutron Star ◽  
Gravitational Waves ◽  
Third Generation ◽  
Binary Neutron Star

scholarly journals Spectral analysis of gravitational waves from binary neutron star merger remnants

2017 ◽  
Vol 96 (6) ◽  
Author(s):  
Francesco Maione ◽  
Roberto De Pietri ◽  
Alessandra Feo ◽  
Frank Löffler
Keyword(s):  
Spectral Analysis ◽  
Neutron Star ◽  
Gravitational Waves ◽  
Binary Neutron Star

scholarly journals Gravitational waves, neutrino emissions and effects of hyperons in binary neutron star mergers

2012 ◽  
Vol 29 (12) ◽  
pp. 124003 ◽  
Author(s):  
Kenta Kiuchi ◽  
Yuichiro Sekiguchi ◽  
Koutarou Kyutoku ◽  
Masaru Shibata
Keyword(s):  
Neutron Star ◽  
Gravitational Waves ◽  
Binary Neutron Star

scholarly journals Binary Neutron Star (BNS) Merger: What We Learned from Relativistic Ejecta of GW/GRB 170817A

Physics ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 194-228 ◽  
Author(s):  
Houri Ziaeepour
Keyword(s):  
Neutron Star ◽  
Gravitational Waves ◽  
Gamma Ray ◽  
Lorentz Factor ◽  
Prompt Gamma ◽  
External Shocks ◽  
Binary Neutron Star ◽  
Tidal Forces ◽  
Relativistic Jet ◽  
Short Grbs

Gravitational Waves (GW) from coalescence of a Binary Neutron Star (BNS) and its accompanying short Gamma-Ray Burst (GRB) GW/GRB 170817A confirmed the presumed origin of these puzzling transients and opened up the way for relating properties of short GRBs to those of their progenitor stars and their surroundings. Here we review an extensive analysis of the prompt gamma-ray and late afterglows of this event. We show that a fraction of polar ejecta from the merger had been accelerated to ultra-relativistic speeds. This structured jet had an initial Lorentz factor of about 260 in our direction, which was O ( 10 ∘ ) from the jet’s axis, and was a few orders of magnitude less dense than in typical short GRBs. At the time of arrival to circum-burst material the ultra-relativistic jet had a close to Gaussian profile and a Lorentz factor ≳ 130 in its core. It had retained in some extent its internal collimation and coherence, but had extended laterally to create mildly relativistic lobes—a cocoon. Its external shocks on the far from center inhomogeneous circum-burst material and low density of colliding shells generated slowly rising afterglows, which peaked more than 100 days after the prompt gamma-ray. The circum-burst material was somehow correlated with the merger. As non-relativistic outflows or tidally ejected material during BNS merger could not have been arrived to the location of the external shocks before the relativistic jet, circum-burst material might have contained recently ejected materials from resumption of internal activities, faulting and mass loss due to deformation and breaking of stars crusts by tidal forces during latest stages of their inspiral but well before their merger. By comparing these findings with the results of relativistic Magneto-Hydro-Dynamics (MHD) simulations and observed gravitational waves we conclude that progenitor neutron stars were most probably old, had close masses and highly reduced magnetic fields.

scholarly journals Gravitational waves from post-merger radially oscillating millisecond pulsars

2019 ◽  
Vol 622 ◽  
pp. A194 ◽  
Author(s):  
Z. G. Dai
Keyword(s):  
Neutron Star ◽  
Gravitational Waves ◽  
High Frequency ◽  
Gamma Ray ◽  
Magnitude Estimate ◽  
Compact Objects ◽  
Millisecond Pulsars ◽  
Binary Neutron Star ◽  
Order Of Magnitude ◽  
Negligible Contribution

Observations of short-duration gamma-ray bursts and their afterglows show that a good fraction (perhaps ≳50%) of binary neutron star mergers lead to strongly magnetized, rapidly rotating pulsars (including millisecond magnetars), no matter whether the pulsar remnants are short- or long-lived. Such compact objects are very likely to have significant radial oscillations and high interior temperatures, as indicated in recent numerical simulations. In this paper, we have investigated rotation-induced gravitational radiation from possibly existing, radially oscillating pulsars after binary neutron star mergers, and find that this mechanism can efficiently damp the radial oscillations. The resulting gravitational waves (GWs) could have a non-negligible contribution to the high-frequency spectrum. We provide an order-of-magnitude estimate of the event rate and suggest that such GW events would be detectable with the advanced LIGO/Virgo or next-generation detectors. Our discussion can also be applied to newborn, radially oscillating, millisecond pulsars formed through the other astrophysical processes.

scholarly journals Search for Post-merger Gravitational Waves from the Remnant of the Binary Neutron Star Merger GW170817

2017 ◽  
Vol 851 (1) ◽  
pp. L16 ◽  
Author(s):  
B. P. Abbott ◽  
R. Abbott ◽  
T. D. Abbott ◽  
F. Acernese ◽  
K. Ackley ◽  
...  
Keyword(s):  
Neutron Star ◽  
Gravitational Waves ◽  
Binary Neutron Star

scholarly journals Observing gravitational waves from the post-merger phase of binary neutron star coalescence

2016 ◽  
Vol 33 (8) ◽  
pp. 085003 ◽  
Author(s):  
J A Clark ◽  
A Bauswein ◽  
N Stergioulas ◽  
D Shoemaker
Keyword(s):  
Neutron Star ◽  
Gravitational Waves ◽  
Binary Neutron Star
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