• Marcus Kubsch
  • Tobias F. Illenseer
  • Wolfgang J. Duschl
Aims. We investigate the suitability of α-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 differential 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 α-disks and derive the significant quantities. In the Keplerian part of the disk our model is consistent with standard stationary α-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. α-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.
Original languageEnglish
Article numberA22
JournalAstronomy and Astrophysics
Volume588
Issue numberApril 2016
Pages (from-to)online only
Number of pages11
ISSN0004-6361
DOIs
Publication statusPublished - 04.2016
Externally publishedYes

ID: 664970