Radiation-Driven Outflows in Active Galactic Nuclei

TL;DR

This paper reviews multi-dimensional simulations of gas outflows in AGN, focusing on radiation-driven outflows from accretion disks and large-scale inflows, and discusses their role in AGN feedback and consistency with observed regions.

Contribution

It provides a comprehensive review of simulation results on radiation-driven AGN outflows and their implications for AGN feedback and observed emission regions.

Findings

Outflows driven from the innermost accretion disk are significant for AGN feedback.

Large-scale inflows supply material to the central engine and drive outflows.

Properties of outflows are consistent with gas in broad- and narrow-line regions.

Abstract

We review the results from multi-dimensional, time-dependent simulations of gas dynamics in AGN. We will focus on two types of outflows powered by radiation emitted from the AGN central engine: (i) outflows driven from the innermost part of an accretion disk and (2) outflows driven from a large-scale inflow that is likely the main supplier of material to the central engine. We discuss the relevance of both types of outflows to the so-called AGN feedback problem. However, the AGN feedback should not be considered separately from the AGN physics. Therefore, we also discuss the issue whether the properties of the same outflows are consistent with the gas properties in broad- and narrow-line regions.