Accretion of the Magnetized Neutrino-Cooled Torus

Fatemeh Hossein Nouri and Agnieszka Janiuk

aNeutrino-cooled accretion flow around a black hole, produced by a compact binary merger, is a promising scenario for jet formation and magnetically-driven winds to explain short duration gamma ray bursts (GRBs) central engine and radioactively-powered kilonova emissions based on GW170817 detection. Magnetorotational instability (MRI) turbulence and Blandford-Znajek (BZ) mechanism are expected to play key roles in the thermal equilibrium of the disk and in driving accretion and creating jets. Using the open-source GRMHD HARM-COOL code, we study the magnetically-driven evolution of an accretion disk with realistic equation of state in the fixed curved space-time background. We identify the effects of the neutrino cooling and the magnetic field, paying particular attention to the dynamical, thermal and composition evolution of the disk and outflows.

Proceedings of the Polish Astronomical Society, vol. 12, 237-240 (2022)

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