MHD Disc Winds and Linewidth Distributions

Abstract

We study AGN emission line profiles combining an improved version of the accretion disc-wind model of Murray & Chiang with the magneto-hydrodynamic model of Emmering et al. We show how the shape, broadening and shift of the C IV line depend not only on the viewing angle to the object but also on the wind launching angle, especially for small launching angles. We have compared the dispersions in our model C IV linewidth distributions to observational upper limit on that dispersion, considering both smooth and clumpy torus models. As the torus half-opening angle (measured from the polar axis) increases above about 18? degrees, increasingly larger wind launching angles are required to match the observational constraints. Above a half-opening angle of about 47? degrees, no wind launch angle (within the maximum allowed by the MHD solutions) can match the observations. Considering a model that replaces the torus by a warped disc yields the same constraints obtained with the two other models.

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• The Sloan Digital Sky Survey Reverberation Mapping Project: the CIV Blueshift, Its Variability, and Its Dependence Upon Quasar Properties
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• Emission Signatures from Sub-parsec Binary Supermassive Black Holes I: Diagnostic Power of Broad Emission Lines
• Reverberation Mapping of the Broad Line Region: application to a hydrodynamical line-driven disk wind solution
• Emission Signatures from Sub-parsec Binary Supermassive Black Holes II: Effect of Accretion Disk Wind on Broad Emission Lines
• A disc wind model for blueshifts in quasar broad emission lines
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• Placing LOFAR-detected quasars in CIV emission space: implications for winds, jets and star formation
• Using the Properties of Broad Absorption Line Quasars to Illuminate Quasar Structure
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• Magnetohydrodynamic DiscWinds and LineWidth Distributions.II
• Reverberation Mapping Data of NGC 5548 Imply a Multicomponent Broad-Line Region
• A Convolutional Neural Network for the Recovery of Transfer Functions From Velocity-Resolved Reverberation Mapping Data