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Introduction to active galaxies

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Figure 32
Figure 32: A generic model for an active galaxy. (a) The central engine is a supermassive black hole surrounded by an accretion disc with jets emerging perpendicular to the accretion disc. (b) The engine is surrounded by an obscuring torus of gas and dust. The broad-line region occupies the hole in the middle of the torus and the narrow-line region lies further out. (c) The entire AGN appears as a bright nucleus in an otherwise normal galaxy. Note that the jets extend to beyond the host galaxy and terminate in radio lobes

 5.1 Introduction

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