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How much do we know about the structure of the torus surrounding the galactic nuclei? Is the shape defined or still under speculations? And are there different structures for this torus possible i.e., does it vary from galaxy-to-galaxy?

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stp30 you've been asking a lot of general questions about AGN recently; it may be best to wait until you have a more specific question in mind. For example, typing 'AGN Torus' in to google gives a number of recent papers and discussions about the range of shapes of torii observed and theorised in the past decade – polyphant May 28 '14 at 10:22

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