Dynamics of gas and dust clouds in active galactic nuclei

Abstract

We analyse the motion of single optically thick clouds in the potential of a central mass under the influence of an anisotropic radiation field ~|cos(θ)|, a model applicable to the inner region of active galactic nuclei. Resulting orbits are analytically soluble for constant cloud column densities. All stable orbits are closed, although they have non-trivial shapes. Furthermore, there exists a stability criterion in the form of a critical inclination, which depends on the luminosity of the central source and the column density of the cloud.

4 pages, 3 figures; language corrections, minor formatting changes

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Cited by in corpus (7)

• Time-resolved infrared emission from radiation-driven central obscuring structures in Active Galactic Nuclei
• The picture of BLR in 2.5-D FRADO: Dynamics & Geometry
• On the dynamics of clouds in the broad-line region of AGNs with an ADAF atmosphere
• Dynamical model of an obscuring clumpy torus in AGNs: I. Velocity and velocity dispersion maps for interpretation of ALMA observations
• Effect of the drag force on the orbital motion of the broad-line region clouds
• Dynamics of an ensemble of clumps embedded in a magnetized ADAF
• Thermal Conduction in Clumpy Disks and BLR clouds