# The influence of outflow and global magnetic field on the structure and spectrum of resistive CDAFs

## TL;DR

This study investigates how outflows and magnetic fields influence the structure and spectrum of resistive convection-dominated accretion flows, revealing their effects on disc temperature, luminosity, and dynamics through self-similar solutions.

## Contribution

It presents a self-similar model of resistive CDAFs incorporating outflows and magnetic fields, analyzing their impact on disc structure and emitted spectra.

## Key findings

- Stronger wind makes the disc hotter and thicker.
- Increasing magnetic field components raises disc temperature and luminosity.
- Resistivity mainly affects radial velocity and surface density.

## Abstract

We examine the effects of a global magnetic field and outflow on radiatively inefficient accretion flow (RIAF) in the presence of magnetic resistivity. We find a self-similar solutions for the height integrated equations that govern the behavior of the flow. We use the mixing length mechanism for studying the convection parameter. We adopt a radius dependent mass accretion rate as $\dot{M}=\dot{M}_{out}{(\frac{r}{r_{out}})^{s}}$ with $s> 0$ to investigate the influence of outflow on the structure of inflow where $s$ is a constant and indication the effect of wind. Also, we have studied the radiation spectrum and temperature of CDAFs. The thermal bermsstrahlung emission as a radiation mechanism is taken into account for calculating the spectra emitted by the CDAFs. The energy that powers bremsstrahlung emission at large radii is provided by convective transport from small radii and viscous and resistivity dissipation. Our results indicate that the disc rotates slower and accretes faster, it becomes hotter and thicker for stronger wind. By increasing all component of magnetic field, the disc rotates faster and accretes slower while it becomes hotter and thicker. We show that the outflow parameter and all component of magnetic field have the same effects on the luminosity of the disc. We compare the dynamical structure of the disc in two different solutions (with and without resistivity parameter). We show that only the radial infall velocity and the surface density could changed by resistivity parameter obviously. Increasing the effect of wind increases the disc's temperature and luminosity of the disc. The effect of magnetic field is similar to the effect of wind in the disc's temperature and luminosity of the disc, but the influence of resistivity on the observational properties is not evident.