Investigation of the obscuring circumnuclear torus in the active galaxy Mrk231

2); (2) ASTRON; (3) JIVE; The Netherlands); Hans-Rainer Kl"ockner (1; Michael A. Garrett (3) ((1) Kapteyn Astronomical Institute; University of Groningen; Willem A. Baan (2)

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Investigation of the obscuring circumnuclear torus in the active galaxy Mrk231

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arxiv astro-ph/0302395 v1 pith:GFQYAOAN submitted 2003-02-19 astro-ph

Investigation of the obscuring circumnuclear torus in the active galaxy Mrk231

Hans-Rainer Kl"ockner (1 , 2) , Willem A. Baan (2) , Michael A. Garrett (3) ((1) Kapteyn Astronomical Institute , University of Groningen , (2) ASTRON , (3) JIVE; The Netherlands) This is my paper

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keywords circumnucleargalaxyhydroxylmaterialobscuringtorusactivecentral

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Here we report on observations of powerful hydroxyl (OH) line emissions that trace the obscuring material within the circumnuclear environment of the galaxy Markarian 231. The hydroxyl (mega)-maser emission shows the characteristics of a rotating, dusty, molecular torus (or thick disk) located between 30 and 100 pc from the central engine. We now have a clear view of the physical conditions, the kinematics and the spatial structure of this material on intermediate size scales, confirming the main tenets of unification models.

Investigation of the obscuring circumnuclear torus in the active galaxy Mrk231

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