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Did Binary Neutron Star Merger GW170817 Leave Behind A Long-lived Neutron Star?

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arxiv 2405.20329 v1 pith:SOBXMZAX submitted 2024-05-30 astro-ph.HE

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keywords neutronstarequatorialmergerringbehindbinarygw170817
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We consider the observational implications of the binary neutron star (BNS) merger GW170817 leaving behind a rapidly rotating massive neutron star that launches a relativistic, equatorial outflow as well as a jet. We show that if the equatorial outflow (ring) is highly beamed in the equatorial plane, its luminosity can be "hidden" from view until late times, even if carrying a significant fraction of the spin-down energy of the merger remnant. This hidden ring reveals itself as a re-brightening in the light curve once it slows down enough for Earth to be within the ring's relativistic beaming solid angle. We compute semi-analytic light curves using this model and find they are in agreement with the observations thus far, and we provide predictions for the ensuing afterglow.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Effects of magnetically driven shocks on nucleosynthesis and kilonovae from neutron star mergers

    astro-ph.HE 2026-05 unverdicted novelty 6.0 of 10

    Magnetically driven shocks from neutron star merger remnants can reheat ejecta to nuclear statistical equilibrium, alter r-process yields, and produce observable changes in kilonova color and light curves.

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