Strongly magnetized accretion with low angular momentum produces a weak jet

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Detalles Bibliográficos
Autores principales:	Galishnikova, Alisa, Philippov, Alexander, Quataert, Eliot, Chatterjee, Koushik, Liska, Matthew
Formato:	Preprint
Publicado:	2024
Materias:	High Energy Astrophysical Phenomena
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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author	Galishnikova, Alisa Philippov, Alexander Quataert, Eliot Chatterjee, Koushik Liska, Matthew
author_facet	Galishnikova, Alisa Philippov, Alexander Quataert, Eliot Chatterjee, Koushik Liska, Matthew
contents	We study the spherical accretion of magnetized plasma with low angular momentum onto a supermassive black hole, utilizing global general relativistic magnetohydrodynamic simulations. Black hole-driven feedback in the form of magnetic eruptions and jets triggers magnetized turbulence in the surrounding medium. We find that when the Bondi radius exceeds a certain value relative to the black hole's gravitational radius, this turbulence restricts the subsequent inflow of magnetic flux, strongly suppressing the strength of the jet. Consequently, magnetically arrested disks and powerful jets are not a generic outcome of the accretion of magnetized plasma, even if there is an abundance of magnetic flux available in the system. However, if there is significant angular momentum in the inflowing gas, the eruption-driven turbulence is suppressed (sheared out), allowing for the presence of a powerful jet. Both the initially rotating and nonrotating flows go through periods of low and high gas angular momentum, showing that the angular momentum content of the inflowing gas is not just a feature of the ambient medium, but is strongly modified by the eruption and jet-driven black hole feedback. In the lower-angular-momentum states, our results predict that there should be dynamically strong magnetic fields on horizon scales, but no powerful jet; this state may be consistent with Sgr A* in the Galactic center.
format	Preprint
id	arxiv_https___arxiv_org_abs_2409_11486
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Strongly magnetized accretion with low angular momentum produces a weak jet Galishnikova, Alisa Philippov, Alexander Quataert, Eliot Chatterjee, Koushik Liska, Matthew High Energy Astrophysical Phenomena We study the spherical accretion of magnetized plasma with low angular momentum onto a supermassive black hole, utilizing global general relativistic magnetohydrodynamic simulations. Black hole-driven feedback in the form of magnetic eruptions and jets triggers magnetized turbulence in the surrounding medium. We find that when the Bondi radius exceeds a certain value relative to the black hole's gravitational radius, this turbulence restricts the subsequent inflow of magnetic flux, strongly suppressing the strength of the jet. Consequently, magnetically arrested disks and powerful jets are not a generic outcome of the accretion of magnetized plasma, even if there is an abundance of magnetic flux available in the system. However, if there is significant angular momentum in the inflowing gas, the eruption-driven turbulence is suppressed (sheared out), allowing for the presence of a powerful jet. Both the initially rotating and nonrotating flows go through periods of low and high gas angular momentum, showing that the angular momentum content of the inflowing gas is not just a feature of the ambient medium, but is strongly modified by the eruption and jet-driven black hole feedback. In the lower-angular-momentum states, our results predict that there should be dynamically strong magnetic fields on horizon scales, but no powerful jet; this state may be consistent with Sgr A* in the Galactic center.
title	Strongly magnetized accretion with low angular momentum produces a weak jet
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2409.11486

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