Figure 4 from A Wind-based Unification Model for NGC 5548: Spectral Holidays, Nondisk Emission, and Implications for Changing-look Quasars

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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 4.

EW of all observed emission lines and Mg II vs. the density of the equatorial obscurer. The plot is divided into three different cases, labeled at the top, based on the behavior of the EWs. The cases are described in the text. The shaded area shows the range in which the holiday observed in NGC 5548 will be produced.

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