Self-similar structure of a hot magnetized flow with thermal conduction

TL;DR

This paper investigates the impact of thermal conduction on the structure of hot magnetized accretion flows, revealing that conduction reduces velocities and disk thickness while increasing surface density, within a constrained parameter space.

Contribution

The study re-examines self-similar solutions for hot magnetized accretion flows, incorporating a new physical constraint that limits the parameter space and clarifies thermal conduction's effects.

Findings

Thermal conduction reduces accretion and flow velocities.

It slightly decreases the vertical thickness of the disk.

Surface density increases with thermal conduction.

Abstract

We have explored the structure of hot magnetized accretion flow with thermal conduction. The importance of thermal conduction in hot accretion flows has been confirmed by observations of the hot gas surrounding Sgr $A^*$ and a few other nearby galactic nuclei. For a steady state structure of such accretion flows a set of self similar solutions are presented. In this paper, we have actually tried to re-check the solution presented by Abbassi et al. (2008) using a physical constrain. In this study we find that Eq 29 places a new constrain that limits answers presented by Abbassi et al. 2008. In that paper the parameter space in which it is established in the new constrain was plotted. However, the new requirement makes up only a small parameter space with physically acceptable solutions. And now in this manuscript we have followed the idea with more effort, and tried to find out how thermal conduction influences the structur of the disks in a physical parameter space. We have found out that the existence of thermal conduction will lead to reduction of accretion and radial and azimuthal velocities as well as the vertical thickness of the disk, which is slightly reduced. Moreover, the surface density of the disk will increase when the thermal conduction becomes important in the hot magnetized flow.