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| Online-Ressource |
Verfasst von: | Schartmann, Marc  |
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 / (s)Interstellarer Staub / (s)Interstellares Gas / (s)Torus / (s)Numerisches Modell  |
| (s)Aktiver galaktischer Kern / (s)Seyfert-Galaxie / (s)Hydrodynamik / (s)Strahlungstransport / (s)Interstellarer Staub / (s)Interstellares Gas / (s)Torus / (s)Schwarzes Loch  |
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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Lokale URL UB: | Zum Volltext |
Models of dust and gas tori in active galactic nuclei / Schartmann, Marc; 2007 (Online-Ressource)
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