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Binary Neutron Star Mergers: a jet Engine for Short Gamma-ray Bursts

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Binary Neutron Star Mergers: a jet Engine for Short Gamma-ray Bursts

dc.contributor.author	Ruiz Meneses, Milton Javier
dc.contributor.author	Lang, Ryan N.
dc.contributor.author	Paschalidis, Vasileios
dc.contributor.author	Shapiro, Stuart L.
dc.date.accessioned	2023-06-02T08:17:22Z
dc.date.available	2023-06-02T08:17:22Z
dc.date.issued	2016
dc.identifier.citation	Ruiz Meneses, Milton Javier Lang, Ryan N. Paschalidis, Vasileios Shapiro, Stuart L. 2016 Binary Neutron Star Mergers: a jet Engine for Short Gamma-ray Bursts Astrophysical Journal Letters 824 1 5
dc.identifier.uri	https://hdl.handle.net/10550/87643
dc.description.abstract	We perform magnetohydrodynamic simulations in full general relativity (GRMHD) of quasi-circular, equal-mass, binary neutron stars that undergo merger. The initial stars are irrotational, n = 1 polytropes and are magnetized. We explore two types of magnetic-field geometries: one where each star is endowed with a dipole magnetic field extending from the interior into the exterior, as in a pulsar, and the other where the dipole field is initially confined to the interior. In both cases the adopted magnetic fields are initially dynamically unimportant. The merger outcome is a hypermassive neutron star that undergoes delayed collapse to a black hole (spin parameter a/MBH ∼ 0.74) immersed in a magnetized accretion disk. About 4000M ∼ 60(MNS/1.625 M⊙) ms following merger, the region above the black hole poles becomes strongly magnetized, and a collimated, mildly relativistic outflow¿an incipient jet¿is launched. The lifetime of the accretion disk, which likely equals the lifetime of the jet, is Δ t ∼ 0.1 (MNS/1.625 M⊙) s. In contrast to black hole-neutron star mergers, we find that incipient jets are launched even when the initial magnetic field is confined to the interior of the stars.
dc.language.iso	eng
dc.relation.ispartof	Astrophysical Journal Letters, 2016, vol. 824, p. 1-5
dc.subject	Astronomia
dc.subject	Astrofísica
dc.title	Binary Neutron Star Mergers: a jet Engine for Short Gamma-ray Bursts
dc.type	journal article
dc.date.updated	2023-06-02T08:17:22Z
dc.identifier.doi	10.3847/2041-8205/824/1/L6
dc.identifier.idgrec	160072
dc.rights.accessRights	open access