# Self-consistent dynamical model of the Broad Line Region

## TL;DR

This paper presents a self-consistent dynamical model of the Broad Line Region in active galactic nuclei, explaining emission line shapes based on dust-driven failed winds and gravitational effects.

## Contribution

It introduces a novel model combining radiation pressure and gravitational forces to describe BLR dynamics and emission line profiles.

## Key findings

- Predicts BLR inner and outer radii
- Models cloud dynamics under dust radiation pressure
- Relates emission line shapes to black hole parameters

## Abstract

We develope a self-consistent description of the Broad Line Region based on the concept of the failed wind powered by the radiation pressure acting on dusty accretion disk atmosphere in Keplerian motion. The material raised high above the disk is illuminated, dust evaportes, and the matter falls back towards the disk. This material is the source of emission lines. The model predicts the inner and outer radius of the region, the cloud dynamics under the dust radiation pressure and, subsequently, just the gravitational field of the central black hole, which results in assymetry between the rise and fall. Knowledge of the dynamics allows to predict the shapes of the emission lines as functions of the basic parameters of an active nucleus: black hole mass, accretion rate, black hole spin (or accretion efficiency) and the viewing angle with respect to the symmetry axis. Here we show preliminary results based on analytical approximations to the cloud motion.