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Dynamical Evolution: Spirals and Bars

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arxiv astro-ph/0008341 v1 pith:TFRFTMVA submitted 2000-08-22 astro-ph

classification astro-ph
keywords massaccretionevolutionbarscentrallikemechanismsspirals
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Non-axisymmetric modes like spirals and bars are the main driver of the evolution of disks, in transferring angular momentum, and allowing mass accretion. This evolution proceeds through self-regulation and feedback mechanisms, such as bar destruction or weakening by a central mass concentration, decoupling of a nuclear bar taking over the gas radial flows and mass accretion, etc.. These internal mechanisms can also be triggered by interaction with the environment. Recent problems are discussed, like the influence of counter-rotation in the m=1 and m=2 patterns development and on mass accretion by a central AGN.

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Cited by 1 Pith paper

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    Molecular gas discs in six low-excitation radio galaxies rotate in an ordered manner but show ubiquitous low-level distortions, with NGC 3557 yielding a black hole mass of 7.1e8 solar masses and NGC 3100 showing evide...

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