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Calendar of Physics Talks Vienna
| Stochastic Oscillations of General Relativistic Disks |
| Speaker: | Gabriela Mocanu (Babes-Bolyai University, Romania) |
| Abstract: | The general relativistic oscillations of a thin accretion disk around compact astrophysical objects are analyzed. These objects interact with the
surrounding medium through non-gravitational forces, modeled via a friction force and a random force respectively. The dynamics of the stochastically perturbed
disk can be formulated in terms of a general relativistic Langevin equation. The vertical oscillations of the disks in the Schwarzschild and Kerr geometries are
considered in detail, and they are analyzed by numerically integrating the corresponding Langevin equations. The importance of this analysis in the context of
explaining the nontrivial power spectral distribution slopes for Active Galactic Nuclei is discussed. |
| Date: | Tue, 10.01.2012 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | TU Wien (Wiedner Hauptstrasse 8-10/136, 1040 Wien, yellow area, 10th floor, seminar room 136) |
| Contact: | Sabine Ertl |
| GHz/THz/FIR Conductivity in the Ferropnictides |
| Speaker: | Ewald Schachinger (TU Graz) |
| Abstract: | The Fermi surface and typical experimental results for the GHz/THz/FIR conductivity in the ferropnictides BaFe2As2 and Fe(SeTe) are discussed. Based on these Fermi surfaces a (minimum) Two-Band BCS model is proposed which can be used to describe the s+- symmetry of the superconducting gap. The properties of this model in the GHz/THz/FIR frequency region are discussed in general before the model is
applied to the analysis of experimental results which have been presented at the beginning of this talk. Caveats of the Two-Band BCS model are also discussed here. Finally, necessary extensions beyond this rather simple and intuitive BCS model necessary for a better and more consistent data analysis are noted as a future project. |
| Date: | Wed, 11.01.2012 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Freihaus Seminarraum 138B, Turm C, 7. OG (rote Leitfarbe) |
| Contact: | Andrei Pimenov |
| Aktueller Stand des Projektes MedAustron mit dem Schwerpunkt nichtklinische Forschung |
| Speaker: | Dr. rer. nat. Ingeborg Zeh (PEG MedAustron GmbH) |
| Abstract: | Ausgestattet mit modernster Technik und Infrastruktur, wird MedAustron, das Zentrum für Ionentherapie und Forschung, in den Bereichen Experimentalphysik, Medizinische Strahlenphysik und Strahlenbiologie ein interessantes Forschungsumfeld bieten. Ab Mitte 2015 werden Wissenschafter die Möglichkeit haben, den Ionenstrahl für ihre Experimente in vielfacher Art und Weise zu nutzen. Im Vortrag werden die Rahmenbedingungen aufgezeigt, die die Forscher erwarten und über die Forschungs- und Kooperationsmöglichkeiten informiert, die MedAustron Research bieten wird. |
| Date: | Wed, 11.01.2012 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan Meyer Institute for subatomic physics, Boltzmanngasse 3, 1090, Raum 2.08 |
| Contact: | Fiona Boes, 01 4277 29701 |
| Drell-Yan production at small transverse momentum and the collinear anomaly |
| Speaker: | Thomas Becher (Univ. Bern) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Thu, 12.01.2012 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| Conformally invariant overdetermined PDEs and Einstein metrics |
| Speaker: | Andreas Cap (Vienna) |
| Abstract: | im Rahmen des Literaturseminars |
| Date: | Thu, 12.01.2012 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock |
| Contact: | R. Beig |
| Dissipative motion with non-constant friction: from phenomenological models to generalized Langevin equations |
| Speaker: | Maximilian Sadilek (Univ. Wien) |
| Abstract: | im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische
Systeme" (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Univ.Wien) |
| Date: | Fri, 13.01.2012 |
| Time: | 14:15 |
| Duration: | 90 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | H. Hüffel, Stefan Thurner |
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