| Asteroseismology |
Most of the stars pulsate like tuning forks, singing a song precisely correlated with their internal structure. Helioseismology has shown since about forty years that the Sun could be probed down to its very internal layers. The solar helium abundance, the depth of the convective envelope, the internal law of rotation, the distribution of the sound speed throughout the Sun, all these results are tremendous successes obtained from the analysis of solar pulsations. Similarly, asteroseismology is a blossoming field and ground-based observations and especially space-borne missions, coupled with more and more precise and complete theoretical models, are due to allow us to enter the stars and "see" what physical processes are at work.
Scientific committee for this workshop:
| Aerts Conny | KULeuven, Belgium (co-chair) | |
| Cuypers Jan | ROB, Belgium | |
| De Cat Peter | ROB, Belgium | |
| De Ridder Joris | KULeuven, Belgium | |
| Montalban Josefina | ULg, Belgium | |
| Noels Arlette | ULg, Belgium (co-chair) | |
| Scuflaire Richard | ULg, Belgium | |
| Thoul Anne | ULg, Belgium |
Plenary Talks:
| Thursday - 7 July 2005 Room: 304 | |
| 11h10~12h00 | How can we probe the interiors of stars? Donald Wayne Kurtz Centre for Astrophysics, University of Central Lancashire, UK |
Afternoon talks:
| Wednesday - 6 July 2005: Observations Room: 204 | |
| 13h30~14h30 | Invited talk: Observational Aspects of Asteroseismology Gerald Handler Institut für Astronomie der Universität Wien, Wien, Austria |
| 14h30-15h00 | Analysis of Mercator data Part I: variable B stars P. De Cat, M. Briquet, C. Aerts, K. Goossens, J. Cuypers, K. Yakut, R. Scuflaire, M.-A. Dupret and lots of observers |
| 15h00-15h30 | Analysis of Mercator data Part II: variable A & F stars J. Cuypers, P. De Cat, K. Goossens, C. Aerts and lots of observers |
| 15h30-16h00 | Coffee break |
| 16h00-16h30 | A new spectroscopic mode identification method W. Zima |
| 16h30-17h00 | Radial Velocity Variations in K Giants: Planets or Pulsations? S. Hekker, S. Reffert, A. Quirrenbach |
| 17h00-17h30 | A line-profile analysis of the large-amplitude Beta Cephei star Xi1
Canis Majoris S. Saesen |
| 17h30-18h00 | Poster Session |
| Thursday - 7 July 2005: Theory Room: S94 | |
| 13h30-14h30 | Invited talk: Theoretical Aspects of Asteroseismology Eric Michel Observatoire de Paris, LESIA, Meudon, France |
| 14h30-15h00 | Oscillations of rapidly rotating stars D. Reese F. Lignières M. Rieutord |
| 15h00-15h30 | Spectroscopic observations of roAp stars: HD24712 M.Sachkov, T.Ryabchikova, I.Ilyin, O.Kochukhov and T.Luftinger |
| 15h30-16h00 | Coffee break |
| 16h00-16h30 | The solar abundance crisis - Part I: Observations N. Grevesse, M. Asplund, J. Sauval |
| 16h30-17h00 | The solar abundance crisis - Part II: Solutions ? J. Montalban, A. Miglio |
| 17h00-17h30 | An asteroseismic study of the Beta Cep star Beta Canis Majoris M. Desmet |
| 17h30-18h00 | Time-dependent convection: local and non-local theory A. Grigahcène, M-A. Dupret, R. Garrido and M. Gabriel |
List of posters for this session:
| 1. | Stability analysis of the pulsating Herbig Ae star HD 104237 and the cepheid star
Polaris M.-A. Dupret, A. Grigahcene, R. Scuflaire and M.J. Goupil |
| 2. | Non-local Time-Dependent Convection models of solar-like oscillators M.-A. Dupret, A. Grigahcene, A. Noels and M. Gabriel |
| 3. | Instability strip for pre-main-sequence stars A. Grigahcène, M-A. Dupret, R. Garrido and M. Gabriel |
| 4. | Spectral line variations in K giants S. Hekker, S. Reffert, A. Quirrenbach |
| 5. | Russian Small Satellite Program for Asteroseismology M.Sachkov and V.Pinchuk |
| 6. | Excitation of oscillations in roAp stars : the roles of He settling and
winds S. Théado |
| 7. | Radiative Forces and Pulsations in Beta Cephei Stars P.-O.Bourge, G.Alecian, A. Thoul, R. Scuflaire, S. Théado |
| 8. | Can beta Cephei Variables be Modelled with Polytropes? M. Godart |
| 9. | The epsilon mechanism in pre-main sequence and main sequence delta Scuti stars G. Lenain |