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Titlebook: Barred Galaxies and Circumnuclear Activity; Proceedings of the N Aage Sandqvist,Per Olof Lindblad Conference proceedings 1996 Springer-Verl

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https://doi.org/10.1057/9780312299187etween 0.1 and 5 pc radius from the dynamic center now strongly favor the existence of a central dark mass of 2.5 to 3.3×10. M. within 0.1 pc of the dynamic center. This central dark mass cannot be a cluster of neutron stars. It is either a compact cluster of stellar black holes or, most likely, a single massive black hole.
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Orbits in barred galaxies,parison of our method with Laskar‘s frequency analysis method is made. In 3-D systems we define one spectrum for stretching numbers and three spectra for helicity angles. A clear distinction between Arnold diffusion and resonance overlap diffusion is made.
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The pattern speed of the Galactic bulge,persion ratios in Baade‘s window. From the velocity dispersion in Baade‘s window, and an assumed distance of 8 kpc to the Galactic center we obtain a mass of 2.7×10. M. and a pattern speed of 39 km s. kpc..
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The galactic center dynamics,potential serves as a source of excitation of the density wave. In the both cases, the generated spiral density wave is consistent with the observed ‘mini-spiral’ if the upper limit to the black hole mass is ≅10.M..
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