The Effect of Large Scale Magnetic Field on Outflow in ADAFs: an Odd Symmetry Configuration

TL;DR

This paper develops self-similar models of hot accretion flows with large-scale magnetic fields exhibiting odd symmetry, revealing how magnetic parameters influence inflow and outflow regions.

Contribution

It introduces a novel self-similar solution framework for ADAFs with odd symmetry magnetic fields, analyzing the impact of various magnetic parameters on flow dynamics.

Findings

Stronger outflows occur with smaller $eta_{r0}$ and larger $eta_{phi0}$, $eta_{ heta0}$, and $ abla$.

Flow solutions are divided into inflow and outflow regions based on radial velocity.

Magnetic field symmetry significantly affects the structure of accretion flows.

Abstract

We construct self-similar inflow-outflow solutions for a hot viscous-resistive accretion flow with large scale magnetic fields that have odd symmetry with respect to the equatorial plane in $B_\theta$, and even symmetry in $B_r$ and $B_\phi$. Following previous authors, we also assume that the polar velocity $v_\theta$ is nonzero. We focus on four parameters: $\beta_{r0}$, $\beta_{\phi0}$ (the plasma beta parameters for associated with magnetic field components at the equatorial plane), the magnetic resistivity $\eta_0$, and the density index $n=-d\ln\rho/d\ln r$. The resulting flow solutions are divided into two parts consisting of an inflow region with a negative radial velocity ($v_r<0$) and an outflow region with $v_r>0$. Our results show that stronger outflows emerge for smaller $\beta_{r0}$ ($\le10^{-2}$ for $n>1$) and larger values of $\beta_{\phi0}$, $\eta_0$ and $n$.