GW170817: observation of gravitational waves from a binary neutron star inspiral
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...EOSs From the LIGO observation, the chirp mass of the progenitor binary of GW170817 can be derived to Mc = 1.188+0.004 −0.002 M⊙, which constrains the individual masses of the component NSs to be in the range of 1.17−1.6 M⊙ by assuming low spins for the NSs (Abbott et al. 2017b)....
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...Recently, a GW event (GW170817) was detected by the advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo Interferometer (Virgo) on 17 August 2017, which was, for the first time, identified to come from a merger of two compact objects with typical masses of NSs (Abbott et al. 2017a)....
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...…2017; Lazzati et al. 2017; Lyman et al. 2018; D’Avanzo et al. 2018), and by an ultraviolet-optical-infrared (UVOIR) transient (Coulter et al. 2017; Abbott et al. 2017c; Arcavi et al. 2017; Andreoni et al. 2017; Chornock et al. 2017; Covino et al. 2017; Cowperthwaite et al. 2017; Drout et al.…...
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...However, since the pre- and post-merger NSs are actually produced through completely different processes (i.e., core-collapse vs merger), they could in principle be constituted by very different matter states....
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...In this case, the Λ−constraint on the pre-merger NSs may not be extended to the post-merger NS. 8 Here the surface magnetic field is considered to be just hidden, but not be annihilated or dissipated....
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