SEMINAR ANNOUNCEMENT - OAT and DAUT SEMINAR - Wednesday, April 4th, at 12:00 noon (Villa Bazzoni)

[Gabriella Schiulaz]

I announce you next OATs-DAUT seminar:

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               OATS-DAUT SEMINAR 
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Speaker: Francesco Marzari (Università di Padova) 

Title: Dynamics of Extrasolar Planets 


Date: Wednesday, April 4th, 2007 
Time: 12:00 
Venue: Villa Bazzoni 
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Abstract: More than a hundred extrasolar planets have been uncovered so far around close stars. This new population of planetes have new striking dynamical features not observed in our solar system. The existence of a large subset of extrasolar gaseous planets orbiting very close to their parent star (hot Jupiters) has suggested the possibility that they migrated large distances inwards from their formation sites where the mass density was high enough to allow runaway accretion of planetesimals and gas infall. I will discuss the origin and implications of the migration mechanisms proposed so far. The eccentricity distribution of exoplanets is also unusual being peaked towards eccentricity significantly larger compared to those of our solar system. I will present some dynamical mechanism that can lead to eccentric orbits including Kozai resonances and gravitational scattering of multiplanet systems. 
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Future seminars:
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OATS-DAUT SEMINAR 
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Speaker: Pierluigi Selvelli (INAF-Osservatorio Astronomico di Trieste) 
Title: The OIII and NIII Bowen fluorescence lines in the symbiotic nova RR Tel 

Date: Wednesday, April 11st, 2007 
Time: 12:00 noon 
Venue: Villa Bazzoni 



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JOINT DAUT-ICTP-OATS-SISSA COLLOQUIUM 
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Speaker: Piero Madau (Univ. of California Observatories) 
Title: Cold Dark Matter Substructure in Galaxy Halos 

Date: Thursday, April 19th, 2007 
Time: 16:00 
Venue: Villa Bazzoni 



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OATS-DAUT SEMINAR 
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Speaker: Christian Theis (Institut fur Astronomie, Universitat Wien) 
Title: Modeling Interacting Galaxies 

Date: Wednesday, May 2nd, 2007 
Time: 12:00 
Venue: Villa Bazzoni 

Abstract: Interacting galaxies are among the most fascinating objects in the universe. Their morphology is frequently characterized by clear indications for an interaction, e.g. by large-scale features denoted as "arms", "bridges" or "rings". In principle, this wealth of information could be sufficient to restrict or fix the dynamical history of interacting galaxies and/or to allow for conclusions about their internal structure, e.g. their dark matter distribution. Unfortunately, an interaction between galaxies depends on many parameters which usually prohibits classical modelling strategies, e.g. those based on complete grids in parameter space. Additionally, state-of-the-art models of galactic evolution should not only include stellar dynamics, but also (multi-phase) gas dynamics, star formation and feedback processes. Such models are more complex from a conceptional point of view and they are computationally expensive.
In my talk I will discuss the problems related to theoretical modelling of interacting galaxies. I will present a multi-method modelling strategy: as a first step a new modelling technique for the analysis of observed interacting galaxies is applied. The method is based on a combination of an evolutionary search strategy (a genetic algorithm) with a fast restricted N-body simulation method. I will demonstrate the applicability of this approach for providing both, a uniqueness test of preferred interaction scenarios and an automatic fitting procedure for sufficiently detailed observations. As a second step the models will be refined by self-consistent models, which are based either on pure stellardynamical calculations or on full galactic evolutionary models including gas dynamics, star formation and feedback mechanisms.


 
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OATS-DAUT SEMINAR 
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Speaker: Ennio Poretti (INAF / Oss. Astron. di Brera) 
Title: Corot: Asteroseismology and Extrasolar Planets from Space 

Date: Tuesday, May 8th, 2007 
Time: 12:00 
Venue: Villa Bazzoni 



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JOINT DAUT-ICTP-OATS-SISSA COLLOQUIUM 
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Speaker: Max Pettini (Institute of Astronomy, Cambridge, UK) 
Title: The First Stars: Clues from Damped Lyman alpha Systems and Lyman Break Galaxies 

Date: Thursday, May 17th, 2007 
Time: 16:00 
Venue: Villa Bazzoni 



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OATS-DAUT SEMINAR 
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Speaker: Andrea Vacchi (INFN Trieste) 
Title: To Be Announced 

Date: Wednesday, May 30th, 2007 
Time: 12:00 
Venue: Villa Bazzoni 



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JOINT DAUT-ICTP-OATS-SISSA COLLOQUIUM 
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Speaker: Albert Stebbins (Fermilab, Chicago) 
Title: Cosmological Large-Scale Structure 

Date: Thursday, June 21th, 2007 
Time: 16:00 
Venue: SISSA, Room D 

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For additional information on scheduled OAT seminars see:
http://adlibitum.oats.inaf.it/seminari/

Gabriella Schiulaz
segreteria OAT
Phone: 040-3199241
schiulaz at oats.inaf.it
segreteria at oats.inaf.it