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- W3100289448 abstract "It was suggested that the relativistic jets in gamma-ray bursts (GRBs) are powered via the Blandford-Znajek (BZ) mechanism or the annihilation of neutrinos and anti-neutrinos from a neutrino cooling-dominated accretion flow (NDAF). The advection and diffusion of the large-scale magnetic field of a NDAF is calculated, and the external magnetic field is found to be dragged inward efficiently by the accretion flow for a typical magnetic Prandtl number P_m=1. The maximal BZ jet power can be ~10^53-10^54 erg/sec for an extreme Kerr black hole, if an external magnetic field with 10^14 Gauss is advected by the NDAF. This is roughly consistent with the field strength of the disk formed after a tidal disrupted magnetar. The accretion flow near the black hole horizon is arrested by the magnetic field if the accretion rate is below than a critical value for a given external field. The arrested accretion flow fails to drag the field inward and the field strength decays, and then the accretion re-starts, which leads to oscillating accretion. The typical timescale of such episodic accretion is in an order of one second. This can qualitatively explain the observed oscillation in the soft extend emission of short-type GRBs." @default.
- W3100289448 created "2020-11-23" @default.
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- W3100289448 date "2014-06-23" @default.
- W3100289448 modified "2023-09-26" @default.
- W3100289448 title "EPISODIC JET POWER EXTRACTED FROM A SPINNING BLACK HOLE SURROUNDED BY A NEUTRINO-DOMINATED ACCRETION FLOW IN GAMMA-RAY BURSTS" @default.
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- W3100289448 doi "https://doi.org/10.1088/0004-637x/789/2/129" @default.
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