SCIENTIFIC PROGRAMME

STELLAR CLUSTERS AND ASSOCIATIONS:
CONVECTION, ROTATION, AND DYNAMOS

Mondello (Palermo), 25-28 May 1999

I) STELLAR STRUCTURE AND EVOLUTION
(Tuesday morning May 25)

08:30 - 09:00 Registration and Poster Set-up

09:00 - 09:15 Welcome Address

09:15 - 09:45 Evolutionary models for high-mass stars G. Meynet (invited)

09:45 - 10:00 Old open clusters as tracers of galactic evolution A. Bragaglia

10:00 - 10:30 Convection and light elements evolution from pre-main sequence to the upper AGB F. D'Antona (invited)

10:30 - 10:45 Observed and theoretical luminosity functions of young open clusters :
NGC 6611 A. Belikov

10:45 - 11:45 Coffee break

11:45 - 12:15 Mixing processes in stellar interiors S. Vauclair (invited)

12:15 - 12:30 The Mass Function of the Pleiades S. T. Hodgkin & R. F. Jameson

12:30 - 13:00 Implications of helioseismology for stellar structure and evolution
J. Christensen-Dalsgaard (invited)




II) CLUSTER DISTANCES AND AGES
(Tuesday afternoon May 25)

15:00 - 15:30 Parallaxes for open clusters using the Hipparcos intermediate astrometric data F. van Leeuwen (invited)

15:30 - 15:45 Do Hipparcos distances to open clusters really disagree with the HR diagram? N. Robichon

15:45 - 16:00 The distance to the Pleiades revisited D. Valls-Gabaud

16:00 - 16:30 A critical assessment of Hipparcos distances M. Pinsonneault (invited)

16:30 - 17:30 Coffee break

17:30 - 18:00 Relative and absolute age determination of open clusters J.C. Mermilliod (invited)

18:00 - 18:15 The low-mass stellar content of Scorpius OB2 as seen by Hipparcos; improved colour-magnitude diagrams based on secular parallaxes J. H. J. de Bruijne

18:15 - 18:45 Theoretical evolutionary models G. Bertelli (invited)

18:45 - 19:00 A global view of activity in T Tauri stars M. T. Lago




III) IMFs, MASS SEGREGATION AND CLUSTER EVOLUTION
(Wednesday morning May 26)
09:00 - 09:30 IMFs in star forming regions and the origin of field stars H. Zinnecker (invited)

09:30 - 09:45 Investigating the process of star formation in young LMC star clusters
R.A. Johnson

09:45 - 10:15 Cluster IMFs and mass segregation: dynamical effects
R. de la Fuente Marcos (invited)

10:15 - 10:30 The onset of cluster formation around intermediate mass stars L. Testi

10:30 - 11:00 Coffee break

11:00 - 11:30 Early evolution of stellar clusters I. Bonnell (invited)

11:30 - 11:45 Wide binaries in the Orion nebula cluster A. Scally

11:45 - 12:00 The history of low-mass star formation in the Upper Scorpius OB association T. Preibisch

12:00 - 12:30 Dynamical evolution of intermediate-age clusters J. Andersen (invited)

IV) FREE AFTERNOON
(Wednesday afternoon May 26).

Excursion to the ruins of the Greek city of Selinunte

V) LITHIUM ABUNDANCES AND METALLICITIES
(Thursday morning May 27)

09:00 - 09:30 Determination of elemental abundances R. Gratton (invited)

09:30 - 10:00 Lithium and beryllium as diagnostics of internal processes C. Deliyannis (invited)

10:00 - 10:30 Lithium depletion in clusters R. D. Jeffries (invited)

10:30 - 11:30 Coffee Break

11:30 - 12:00 Dating young clusters with the lithium test J. Stauffer (invited)

12:00 - 12:15 A lithium age for the young cluster IC2391 D. Barrado

12:15 - 12:30 Formation of visible spectra of L-dwarfs Ya.V. Pavlenko

12:30 - 13:00 Optical spectroscopy of open clusters A. K. Dupree (invited)

VI) ROTATION AND ANGULAR MOMENTUM EVOLUTION
(Thursday afternoon May 27)

15:00 - 15:30 Circumstellar disks and PMS rotation: examining disk-regulated stellar rotation K. G. Stassun (invited)

15:30 - 16:00 Rotation of cluster stars S. A. Barnes (invited)

16:00 - 16:15 Rotation-induced lithium depletion of solar-type stars in young stellar clusters G. Ruediger

16:15 - 16:30 Orbital period modulation and hydromagnetic dynamo action in active binaries A. F. Lanza

16:30 - 17:00 Angular momentum evolution K. MacGregor (invited)

18:00 - 24:00 Closing dinner at Conte Federico Palace in old Palermo

VII) MAGNETIC FIELDS AND STELLAR ACTIVITY
(Friday morning May 28)

09:00 - 09:30 Measurements of stellar magnetic fields C. Johns-Krull (invited)

09:30 - 10:00 Dynamo mechanisms A. Brandenburg (invited)

10:00 - 10:30 Magnetic activity phenomena on stars: from the photosphere up to transition region layers M. Rodono` (invited)

10:30 - 11:00 Coffee break

11:00 - 11:15 Polar activity: a natural explanation for stellar spindown saturation
D. L. Buzasi

11:15 - 11:30 Chromospheric emission and angular momentum evolution in G-K giants and supergiants L. Pasquini

11:30 - 12:00 Coronal activity among open cluster stars S. Randich (invited)

12:00 - 12:15 An HRI survey of NGC 2264: properties of X-ray emission and IMF determination E. Flaccomio

12:15 - 12:30 Accretion structures of DR Tau K. Smith

12:30 - 13:00 X-Rays from old open clusters F. Verbunt (invited)

VIII) NEW TECHNOLOGIES/LARGE-SCALE PROGRAMS
(Friday afternoon May 28)

15:00 - 15:15 New instrumentation for stellar study at ESO L. Pasquini

15:15 - 15:30 Wide field astronomy instruments on UK Telescopes R. D. Jeffries

15:30 - 15:45 New optical/IR instrumentation in the US J. Stauffer

15:45 - 16:00 Community contribution and feedback to the open cluster database
J.-C. Mermilliod

16:00 - 16:30 The WIYN open cluster study R. D. Mathieu (invited)

16:30 - 17:00 Coffee Break

17:00 - 17:30 Future X-ray missions J. H. M. M. Schmitt (invited)

17:30 - 17:45 Galactic X-ray surveys S. Sciortino

17:45 - 18:15 The impact of the GAIA mission on open cluster research F. Favata (invited)

18:15 - 18:30 Prospects for large european collaborative programmes on open clusters
R. Pallavicini

18:30 - 19:00 Summary talk and closing of the meeting J. Linsky