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A Wind-based Unification Model for NGC 5548: Spectral Holidays, Nondisk Emission, and Implications for Changing-look Quasars

• Authors: M. Dehghanian, G. J. Ferland, B. M. Peterson, G. A. Kriss, K. T. Korista, M. Chatzikos, F. Guzmán, N. Arav, G. De Rosa, M. R. Goad, M. Mehdipour, and P. A. M. van Hoof

2019 The Astrophysical Journal Letters 882 L30.

• Provider: AAS Journals

Caption: Figure 1.

Diagram of the disk wind in NGC 5548 (not to scale). The BH is surrounded by the accretion disk. At larger radii the BLR is indicated by orange/red turbulent clouds. The disk wind rises nearly vertically from the surface of the accretion disk, where it has a dense, high-column-density base. At higher elevations, radiation pressure accelerates the wind and bends the streamlines down along the 30° inclination of the observer’s LOS to the rotation axis of the disk (Kaastra et al. 2014).