Charged tori in spherical gravitational and dipolar magnetic fields

TL;DR

This paper models charged fluid tori orbiting in combined gravitational and magnetic fields, revealing new off-equatorial structures and outflows, which could inform understanding of dusty tori around accretion disks.

Contribution

It introduces a Newtonian model of charged tori in combined fields, demonstrating the existence of off-equatorial tori and outflows, a novel insight into gravity-electromagnetism interactions.

Findings

Existence of off-equatorial charged tori.

Presence of equatorial tori with cusps and outflows.

Insights into vertical structure of dusty tori.

Abstract

A Newtonian model of non-conductive, charged, perfect fluid tori orbiting in combined spherical gravitational and dipolar magnetic fields is presented and stationary, axisymmetric toroidal structures are analyzed. Matter in such tori exhibits a purely circulatory motion and the resulting convection carries charges into permanent rotation around the symmetry axis. As a main result, we demonstrate the possible existence of off-equatorial charged tori and equatorial tori with cusps enabling outflows of matter from the torus also in the Newtonian regime. These phenomena represent qualitatively a new consequence of the interplay between gravity and electromagnetism. From an astrophysical point of view, our investigation can provide insight into processes that determine the vertical structure of dusty tori surrounding accretion disks.