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Verfasst von:Schartmann, Marc   i
Titel:Models of dust and gas tori in active galactic nuclei
Verf.angabe:Marc Schartmann
Jahr:2007
Umfang:Online-Ressource
Weitere Titel:Übers. des Hauptsacht.: Modelle für Staub- und Gastori in Aktiven Galaktischen Kernen
Hochschulschrift:Heidelberg, Univ., Diss, 2007
Abstract:The goal of this thesis is to gain theoretical understanding of the distribution of dust and gas in the innermost parsecs of Active Galactic Nuclei. Unified schemes demand a circum-nuclear disk or "torus" to geometrically unify two separate classes of observed objects (face-on and edge-on view onto the torus). In a multi-step approach, we work towards the establishment of realistic simulations of this massive and dense gas and dust reservoir, in order to be able to interpret near- and mid-infrared interferometric observations (MIDI, AMBER), which are able to resolve dust structures in the centres of Seyfert galaxies. In a first step, we investigate an analytical torus model (the so-called "Turbulent Torus Model") with the help of radiative transfer calculations and find gross agreement with large aperture, as well as high-resolution observations of Seyfert galaxies. However, the model SEDs show too pronounced silicate emission features in the face-on case. This can be overcome with the help of three-dimensional clumpy tori, calculated in a second step. Special emphasis is put on the differences of clumpy and continuous dust distributions, also concerning interferometric observations. In a further step, we apply hydrodynamic simulations to trace the evolution of a nuclear star cluster, which provides energy via discrete supernova explosions and mass from stellar mass loss...
URL:kostenfrei: Volltext: http://nbn-resolving.de/urn:nbn:de:bsz:16-opus-71865
 Volltext: http://archiv.ub.uni-heidelberg.de/volltextserver/volltexte/2007/7186
 Volltext: http://archiv.ub.uni-heidelberg.de/volltextserver/volltexte/2007/7186/pdf/phd_thesis_schartmann.pdf
URN:urn:nbn:de:bsz:16-opus-71865
Schlagwörter:(s)Aktiver galaktischer Kern   i / (s)Interstellarer Staub   i / (s)Interstellares Gas   i / (s)Torus   i / (s)Numerisches Modell   i
 (s)Aktiver galaktischer Kern   i / (s)Seyfert-Galaxie   i / (s)Hydrodynamik   i / (s)Strahlungstransport   i / (s)Interstellarer Staub   i / (s)Interstellares Gas   i / (s)Torus   i / (s)Schwarzes Loch   i
Datenträger:Online-Ressource
Dokumenttyp:Hochschulschrift
Sprache:eng
Bibliogr. Hinweis:Erscheint auch als : Druck-Ausgabe: Schartmann, Marc: Models of dust and gas tori in active galactic nuclei. - 2007. - IV, 176 S.
K10plus-PPN:530011182
 
 
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