Self-similar Solution of Hot Accretion Flow with Thermal Conduction and Anisotropic Pressure

TL;DR

This paper investigates how anisotropic thermal conduction, pressure, and magnetic fields influence hot accretion flows around black holes, revealing effects on wind regions and energy fluxes with implications for galactic centers.

Contribution

It provides a detailed analysis of the combined effects of anisotropic conduction, pressure, and magnetic fields on hot accretion flows using MHD equations, highlighting new insights into flow dynamics.

Findings

Anisotropic pressure shrinks the wind region.

Magnetic field strength influences energy flux dominance.

Results applicable to Sgr A* and M87 galaxy.

Abstract

We explore the effects of anisotropic thermal conduction, anisotropic pressure, and magnetic field strength on the hot accretion flows around black holes by solving the axisymmetric, steady-state magnetohydrodynamic equations. The anisotropic pressure is known as a mechanism for transporting angular momentum in weakly collisional plasmas in hot accretion flows with extremely low mass accretion rates. However, anisotropic pressure does not extensively impact the transport of the angular momentum, it leads to shrinkage of the wind region. Our results show that the strength of the magnetic field can help the Poynting energy flux overcomes the kinetic energy flux. This result may be applicable to understand the hot accretion flow in the Galactic Center Sgr A* and M87 galaxy.