Origin of non-keplerian motions of masers in NGC 1068

Details Origin of non-keplerian motions of masers in NGC 1068 Origin of non-keplerian motions of masers in NGC 1068

2002-10-08

arxiv.org/abs/astro-ph/0210180v2

Astron.Astrophys. 395 (2002) L21-L24

Astronomy and Astrophysics

Astrophysics

4 pages; accepted in A&A Letters

Scientific paper

10.1051/0004-6361:20021445

We demonstrate that the ``sub-keplerian'' rotation curve of maser spots in NGC 1068 can be explained by the gravitational attraction of the disc orbiting the central black hole. Possible parameters matching observations are: black hole mass of 12 million solar masses, disc outer edge > 1.3 pc, aspect ratio in the range 0.003 to 0.3, surface density varying approximately as 1/R, and disc mass of about 9.4 million solar masses. The physical conditions required for the excitation of masers are fulfilled, and the outer disc would stand in a gravitationally marginally stable state.

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