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The Role of Turbulence and Winding in the Development of Large-scale, Strong Magnetic Fields in Long-lived Remnants of Binary Neutron Star Mergers by Aguilera-Miret, Ricard; Palenzuela, Carlos; Carrasco, Federico; Viganò, Daniele is a scholarly article available to read on EtoBox.

What is The Role of Turbulence and Winding in the Development of Large-scale, Strong Magnetic Fields in Long-lived Remnants of Binary Neutron Star Mergers about?

We perform a long and accurate Large-Eddy Simulation of a binary neutron star merger, following the newly formed remnant up to 110 milliseconds. The combination of high-order schemes, high-resolution and the gradient subgrid-scale model allow us to have among the highest effective resolutions ever achieved. Our results show that, although the magnetic fields are strongly amplified by the Kelvin-Helmholtz instability, they are coherent only over very short spatial scales until t \gtrsim 30 ms. Around that time, magnetic winding becomes more efficient leading to a linear growth of the toroidal component and slowly ordering the field to more axisymmetric, large scales. The poloidal component only starts to grow at small scales at much later times t \gtrsim 90 ms, in a way compatible with the magneto-rotational instability. No strong large-scale poloidal field or jet is produced in the timescales spanned by our simulation, although there is an helicoidal structure gradually developing at late times. We highlight that soon after the merger the topology is always strongly dominated by toroidal structures, with a complex distribution in the meridional plane and highly turbulent perturbati

Author

Aguilera-Miret, Ricard; Palenzuela, Carlos; Carrasco, Federico; Viganò, Daniele

Published

2023

Language

EN