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- W4366206435 abstract "Gamma-ray bursts resulting from binary neutron-star mergers are sometimes preceded by precursor flares. These harbingers may be ignited by quasi-normal modes, excited by orbital resonances, shattering the stellar crust of one of the inspiralling stars up to $gtrsim10$ seconds before coalescence. In the rare case that a system displays two precursors, successive overtones of either interface- or $g$-modes may be responsible for the overstrainings. Since the free-mode frequencies of these overtones have an almost constant ratio, and the inertial-frame frequencies for rotating stars are shifted relative to static ones, the spin frequency of the flaring component can be constrained as a function of the equation of state, the binary mass ratio, the mode quantum numbers, and the spin-orbit misalignment angle. As a demonstration of the method, we find that the precursors of GRB090510 hint at a spin frequency range of $2 lesssim nu_{star}/text{Hz} lesssim 20$ for the shattering star if we allow for an arbitrary misalignment angle, assuming $ell=2$ $g$-modes account for the events." @default.
- W4366206435 created "2023-04-19" @default.
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- W4366206435 date "2023-04-14" @default.
- W4366206435 modified "2023-10-05" @default.
- W4366206435 title "Measuring spin in coalescing binaries of neutron stars showing double precursors" @default.
- W4366206435 doi "https://doi.org/10.48550/arxiv.2304.07170" @default.
- W4366206435 hasPublicationYear "2023" @default.
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