EAS SYMPOSIUM 2: Stellar Evolution AND ASTEROSEISMOLOGY

23-24 August 2007

Contact: Georges Alecian (France)

The symposium is open for wide discussions on stellar structure, evolution, and related aspects. Stellar physics is faced with a large amount of high quality observational data (multi-wavelengths, multi-objects, high resolution spectroscopy, etc.), an important challenge for theoretical/numerical modeling. The meeting will partially focus on asteroseismology, a recent emerging field in astrophysics. The oscillations of solar-type stars represent an exciting new field with many developments, also connected to the exoplanets field through the asteroseismology of exoplanet host stars. The COROT satellite (dedicated to asteroseismology and detection of exoplanet transits), which was launched on the end of 2006, is a good example of the recent evolution of this research field, since first observational results are expected by the end of this year, and many subjects of stellar physics will be tackled by this mission. Stellar modeling is also closely dependent on good diagnostic tools and on the ability to correctly interpret observations of the most visible part of stars: their atmosphere. For this reason, the meeting will also consider observations and modeling of stellar atmospheres, as tools for understanding the entire star.

SOC

Georges Alecian (France, Chair), Torsten Boehm (France), Areg Mickaelian (Armenia), Arlette Noels (Belgium), Sylvie Vauclair (France).

Topics (preliminary):

- inner structure of the stars and their evolution
- close binaries and variability
- early stages of evolution and instability
- oscillations in Solar-type stars
- stellar oscillations and exoplanets
- final stages of evolution: WD, NS, and BH
- models of atmospheres and diagnostic tools

PROGRAM

Thursday, August 23, 2007

Session 1: Surveys. Chair: Sylvie Vauclair

11:20-12:00       Georges Alecian: The COROT Satellite and its First Glances to the Stars (invited)

12:00-12:30       Kamo Gigoyan: Cool Carbon Stars in the Halo  

12:30-14:00       Lunch break

14:00-14:30       Lilit Hovhannisyan: Optical Identification and Study of Infrared Stellar Sources in Böotes 

14:30-15:00       Daniel Risquez^: High Energy Sources Observed with OMC  

15:00-15:30       Parandzem Sinamyan: The Nature of the FBS Blue Stellar Objects     

15:30-16:00       Coffee break

16:00-16:30       Sergio Sousa: Spectroscopic Parameters for a Sample of Bright Solar-type Stars       

Session 2: Stars and Stellar Systems 1. Chair: Georges Alecian

16:30-17:10       Sylvie Vauclair: Asteroseismology of Solar-type Stars (invited)     

17:10-17:40       Eugenia Karitskaya: The Results of CYG X-1 High-Resolution Optical Spectral Monitoring    

Friday, August 24, 2007

Session 3: Stars and Stellar Systems 2. Chair: Sylvie VAUCLAIR

10:00-10:30       Patricia Lampens: Multiperiodicity of the Pulsating Component in the Algol-type Binary System CT Her     

10:30-11:00       Coffee break

11:00-11:30       Leonid Matveenko: Formation of Low Mass Stars, Disks, and Outflows       

11:30-12:00       Reza Pazhouhesh: Radial Velocity and Light Curves Analysis of the Eclipsing Binary V1425 Cygni  

12:00-12:30       Vassilios Manimanis: The First Photometric Analysis of the Near-Contact Eclipsing Binary V499 Cygni 

12:30-14:00       Lunch break

Session 4: STELLAR STRUCTURES AND EVOLUTION. Chair: Georges ALECIAN

14:00-14:40       Gerard Vauclair: The Seismology of Stars in the Ultimate Stages of their Evolution (invited)

14:40-15:20       Stefano Bagnulo: The Evolution of A and B Type Stars in the Main Sequence: Theory Predictions and Observational Constraints (invited)     

15:30-16:00       Coffee break

16:00-16:30       Izold Pustylnik: Extreme Horizontal Branch Stars: Observational Evidence on Binary Nature and Evolutionary History

16:30:17:00        Evgeniy Tikhomolov: 3D Hydrodynamical Model of Lithium Mixing at the Base of the Solar Convection Zone     

Session 5: Poster presentations and General Discussion. Chair: TBD

17:00-17:30       POSTER SESSION

17:30-18:00       GENERAL DISCUSSION

POSTERS

S2-P01. Anastasia Gamarova, David Mkrtichian: New Aspects of the Mode Identification in the Eclipsing Binaries       

S2-P02. Anastasia Gamarova, A. Hatzes, David Mkrtichian: High Precision Measurements of RVs: a Powerful Tool for Tomography of Atmospheres of roAp-stars

S2-P03. Alex Golovin, Elena Pavlenko, M. Andreev, M.C. Galvez, J. Pandey, Yuliana Kuznetsova, Viktoriia Krushevska: Monitoring of FR Cnc Flaring Activity  

S2-P04. Alex Golovin, Kazuya Ayani, Elena Pavlenko, Tom Krajci, Yuliana Kuznyetsova, Arne Henden, Viktoriia Krushevska, Shawn Dvorak, Kirill Sokolovsky: SDSS J102146.44+234926.3: New WZ Sge-type Dwarf Nova   

S2-P05. Alexios Liakos, Panagiotis Niarchos: The Light-Time Effect in Eclipsing Binaries: the Cases of GK Cep and VY Cet    

S2-P06. Antonio Mampaso, and the IPHAS Collaboration: IPHAS Discovers Hundreds of New Planetary Nebulae at the Galactic Plane

S2-P07. Juleta Ohanesyan: The Behavior Resonance Doublet 2800MGII in A-Stars   

S2-P08. R. Pavlovič, Z. Cvetkovič, Slobodan Ninkovič: Long-Time Evolution of Orbital Elements: Case of ADS 14296     

S2-P09. Natalia Shakht, Alexei Kisselev, E.A. Grosheva, D.L. Gorshanov, L.G. Romanenko: The Estimation of a Possible Hidden Mass for Stars Observed with 65 cm Refractor at Pulkovo     

S2-P10. Sotirios Tsantilas, Eleni Rovithis-Livaniou: The Gravity Darkening Effect under the Influence of Additional Radial Forces in Binary Modeling

S2-P11. Burak Ulas, Panagiotis Niarchos, Patricia Lampens, Vassilios Manimanis,

P. Van Cauteren: The Algol-type Binary VV UMa: New VRI Photometry and Search for Pulsations     

S2-P12. Vladimir A. Zakhozhay: The Statistic Description of the First Fragmentation in the Stellar Systems