Magnetized hypermassive neutron star collapse: a central engine for short gamma-ray bursts

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dc.creatorShibata, Masaru
dc.creatorDuez, Matthew D.
dc.creatorLiu, Yuk Tung
dc.creatorShapiro, Stuart L.
dc.creatorStephens, Branson C.
dc.date2005-11-04
dc.date.accessioned2026-07-07T10:43:23Z
dc.date.available2026-07-07T10:43:23Z
dc.descriptionA hypermassive neutron star (HMNS) is a possible transient formed after the merger of a neutron star binary. In the latest magnetohydrodynamic simulations in full general relativity, we find that a magnetized HMNS undergoes `delayed' collapse to a rotating black hole (BH) as a result of angular momentum transport via magnetic braking and the magnetorotational instability. The outcome is a BH surrounded by a massive, hot torus with a collimated magnetic field. The torus accretes onto the BH at a quasi-steady accretion rate ~10 solar mass/s; the lifetime of the torus is ~10 ms. The torus has a temperature \sim 10^{12} K, leading to copious neutrino-antineutrino thermal radiation. Therefore, the collapse of an HMNS is a promising scenario for generating short-duration gamma-ray bursts and an accompanying burst of gravitational waves and neutrinos.
dc.description4 pages, 2 figures, submitted to Phys. Rev. Letter
dc.identifierhttps://arxiv.org/abs/astro-ph/0511142
dc.identifierhttp://arxiv.org/abs/astro-ph/0511142
dc.identifierPhys.Rev.Lett.96:031102,2006
dc.identifierdoi:10.1103/PhysRevLett.96.031102
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182225
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleMagnetized hypermassive neutron star collapse: a central engine for short gamma-ray bursts
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