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    Accretion disk dynamics alpha-viscosity in self-similar self-gravitating models

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    Author
    Kubsch, Marcus
    Illenseer, Tobias F.
    Duschl, Wolfgang J.
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2016-03-11
    Keywords
    accretion, accretion disks
    turbulence
    hydrodynamics
    methods: analytical
    
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    Publisher
    EDP SCIENCES S A
    Citation
    Accretion disk dynamics 2016, 588:A22 Astronomy & Astrophysics
    Journal
    Astronomy & Astrophysics
    Rights
    © ESO 2016.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Aims. We investigate the suitability of alpha-viscosity in self-similar models for self-gravitating disks with a focus on active galactic nuclei (AGN) disks. Methods. We use a self-similar approach to simplify the partial di ff erential equations arising from the evolution equation, which are then solved using numerical standard procedures. Results. We find a self-similar solution for the dynamical evolution of self-gravitating alpha-disks and derive the significant quantities. In the Keplerian part of the disk our model is consistent with standard stationary alpha-disk theory, and self-consistent throughout the self-gravitating regime. Positive accretion rates throughout the disk demand a high degree of self-gravitation. Combined with the temporal decline of the accretion rate and its low amount, the model prohibits the growth of large central masses. Conclusions. alpha-viscosity cannot account for the evolution of the whole mass spectrum of super-massive black holes (SMBH) in AGN. However, considering the involved scales it seems suitable for modelling protoplanetary disks.
    ISSN
    0004-6361
    1432-0746
    DOI
    10.1051/0004-6361/201527092
    Version
    Final published version
    Additional Links
    http://www.aanda.org/10.1051/0004-6361/201527092
    ae974a485f413a2113503eed53cd6c53
    10.1051/0004-6361/201527092
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