Self-consistent dynamical model of the Broad Line Region

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.

arXiv commentProceeding of the conference "Quasars at all cosmic epochs", held in Padova, April 2-7, 2017. Frontiers in Astronomy and Space Sciences (in press)

References in corpus (7)

• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• The origin of the Broad Line Region in Active Galactic Nuclei
• The effect of radiation pressure on emission line profiles and black hole mass determination in active galactic nuclei
• Evidence for periodicity in 43 year-long monitoring of NGC 5548
• The dust origin of the Broad Line Region and the model consequences for AGN unification scheme
• Quasar Rain: the Broad Emission Line Region as Condensations in the Warm Accretion Disk Wind