SEMINAR ANNOUNCEMENT-JOINT DAUT-ICTP-OAT-SISSA COLLOQUIUM-Thursday April 19th at 4.00 pm (please note venue: Villa Bazzoni)

[Gabriella Schiulaz]

I announce you next Joint Colloquium 
(please note venue is 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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Abstract: Revealing the nature of dark matter is fundamental to cosmology and particle physics. It is a clear, unique prediction of cold dark matter (CDM) theories that galaxies are embedded in massive, extended halos teeming with self-bound substructure or ``subhalos''. In this talk I will present initial results from "Via Lactea", the highest resolution simulation to date of Galactic CDM substructure. It resolves a Milky Way-size host with over 200 million particles, ten times more than achieved previously. The wealth of substructure predicted by this simulation has implications for direct and indirect dark matter searches, stellar streams, disk heating, gravitational lensing, and the Local Group dwarf galaxy population (the "missing satellite problem"). 
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Future Seminars:
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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: The scientific profile of the space mission Corot: 

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

Abstract: The COROT (COnvection, ROtation and planetary Transits) mission, very successfully launched in December 2006, is intended to provide high-precision (noise level in the frequency spectrum 0.7 ppm over a 5 d time baseline) photometric monitoring of stellar targets to achieve three main objectives: 
1) stellar seismology of dwarf stars to give direct information on the structure and dynamics of their interiors (Seismology programme). Among those, a few bright stars (V<8.0) will be studied continuously for 150 days (primary targets), along with up to 9 fainter stars (V<9.5, secondary targets), located in the same field of the primary targets; 
2) the detection of Earth-like planets from eclipses of their parent stars (Exoplanet programme); 
3) the accurate high precision, continuous, photometric monitoring of many thousands of fainter stars that lie aside in the Exoplanetary fields. 



 
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OATS-DAUT SEMINAR 
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Speaker: Nick Schneider (University of Colorado, Boulder) 
Title: To Be Announced 

Date: Friday, May 11th, 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: Erica Ellingson (University of Colorado, Boulder) 
Title: To Be Announced 

Date: Tuesday, May 29th, 2007 
Time: 12:00 
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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OATS-DAUT SEMINAR 
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Speaker: Kenji Bekki (University of New South Wales, Australia) 
Title: Globular cluster systems and galaxy formation 

Date: Wednesdday, June 6th, 2007 
Time: 12:00 
Venue: Villa Bazzoni 

Abstract: We discuss the origin of physical properties of globular cluster systems (GCSs) in galaxies in terms of galaxy formation and evolution processes. Based on numerical simulations of dynamical evolution of GCSs in galaxies, we particularly discuss (1) the origin of radial density profiles of GCSs, (2) kinematics of GCSs in elliptical galaxies, (3) transformation from nucleated dwarf galaxies into GCs (e.g., omega Centauri), (4) the origin of GCSs in the Large Magellanic Cloud, and (5) formation of intragroup and intracluster GCs.


 
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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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OATS-DAUT SEMINAR 
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Speaker: Patrick François (Observatoire de Paris, Meudon) 
Title: TBD 

Date: Wednesday, October 10th, 2007 
Time: 12:00 
Venue: Villa Bazzoni 

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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