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

Persistent Link:
http://hdl.handle.net/10150/614710
Title:
Accretion disk dynamics alpha-viscosity in self-similar self-gravitating models
Author:
Kubsch, Marcus; Illenseer, Tobias F.; Duschl, Wolfgang J.
Affiliation:
Univ Arizona, Steward Observ
Issue Date:
2016-03-11
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
Keywords:
accretion, accretion disks; turbulence; hydrodynamics; methods: analytical
Version:
Final published version
Additional Links:
http://www.aanda.org/10.1051/0004-6361/201527092

Full metadata record

DC FieldValue Language
dc.contributor.authorKubsch, Marcusen
dc.contributor.authorIllenseer, Tobias F.en
dc.contributor.authorDuschl, Wolfgang J.en
dc.date.accessioned2016-06-24T21:24:36Z-
dc.date.available2016-06-24T21:24:36Z-
dc.date.issued2016-03-11-
dc.identifier.citationAccretion disk dynamics 2016, 588:A22 Astronomy & Astrophysicsen
dc.identifier.issn0004-6361-
dc.identifier.issn1432-0746-
dc.identifier.doi10.1051/0004-6361/201527092-
dc.identifier.urihttp://hdl.handle.net/10150/614710-
dc.description.abstractAims. 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.en
dc.language.isoenen
dc.publisherEDP SCIENCES S Aen
dc.relation.urlhttp://www.aanda.org/10.1051/0004-6361/201527092en
dc.rights© ESO 2016en
dc.subjectaccretion, accretion disksen
dc.subjectturbulenceen
dc.subjecthydrodynamicsen
dc.subjectmethods: analyticalen
dc.titleAccretion disk dynamics alpha-viscosity in self-similar self-gravitating modelsen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.identifier.journalAstronomy & Astrophysicsen
dc.description.collectioninformationThis 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.en
dc.eprint.versionFinal published versionen
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