Lund Observatory
A one-day symposium at Lund Observatory
Friday April 6, 2001
Lund Observatory lecture hall, Stora Södergatan 47,
Lund
13:15-13:20 INTRODUCTION
13:20-15:00 FIRST SESSION
Axel BRANDENBURG, Copenhagen:
HELICITY OF SOLAR SURFACE MAGNETIC FIELDS
Bertil DORCH, Stockholm: PROPERTIES OF MAGNETIC FLUX PRIOR TO
EMERGENCE
Matthias STEFFEN, Potsdam: INFLUENCE OF PHOTOSPHERIC T-INHOMOGENEITIES ON SPECTROSCOPIC ABUNDANCE DETERMINATIONS
Dainis DRAVINS, Lund: OBSERVING ABSOLUTE WAVELENGTH SHIFTS: A NEW DIAGNOSTIC TOOL FOR STELLAR CONVECTION
Dan KISELMAN, Stockholm: THE POTENTIAL OF THE NEW SWEDISH SOLAR TELESCOPE ON LA PALMA
15:00-15:30 Coffee break
15:30-17:00 SECOND SESSION
Åke NORDLUND, Copenhagen: PRANDTL NUMBER DEPENDENCE (OR NOT) OF STELLAR CONVECTION / MAGNETIC STARS
Sven WEDEMEYER, Kiel: ACOUSTIC WAVES AND HEATING OF THE SOLAR CHROMOSPHERE
Bernd FREYTAG, Uppsala: BETELGUESE - TOWARDS RADIATION HYDRODYNAMICS SIMULATIONS OF AN ENTIRE SUPERGIANT
Hans-Günter LUDWIG, Lund: MODELS FOR SOLAR SUPERGRANULATION AND M-DWARF ATMOSPHERES: ARE WE THERE?
18:00-20:00 Dinner with continued discussions
Restaurant Blue Diamond, Bangatan 4 (opposite the train station)
Travel: The schedule is set to permit, as far as possible, one-day trips to Lund. Southbound train travel in the morning: Leave Uppsala 07:15, X2000 leaves Stockholm at 08:18, arriving Lund 12:34. Northbound in the evening: X2000 leaves Lund at 19:27, arriving in Stockholm 23:41; overnight train to Stockholm leaves Lund at 23:15. Eastbound: leave Århus 07:39, arrive to Lund via Copenhagen 11:41; leave Lund 19:39, arriving to Århus via Copenhagen 00:08. Trains across to Copenhagen run every 20 minutes until midnight, and once an hour in the later night. For air travelers, the meeting localities are within easy walking distance from a bus stop for the Malmö/Sturup airport.
Information for speakers: Overhead and slide projectors, and a network-connected PC (5Gb free space), together with a computer/video projector are available in the lecture hall; for details or special needs, please contact the organizers.
Suggested topics for further discussion
Hydrodynamic atmosphere models and abundances
Large-scale models for oscillation and supergranulation [MPEG movie by Hans-Günter Ludwig]
Simulations of whole stars
Overshoot and transport of dust
Convection and turbulence
Chromospheric models
Coding issues for parallel computers
The potential of the new Swedish solar telescope on La Palma
Absolute wavelength shifts to diagnose stellar granulation
Time variability of solar/stellar irradiance as a measure of surface convection
Temporal flickering of radial velocity as a measure of surface convection
Convection signatures in white-dwarf irradiance fluctuations & spectra
VLTI: Interferometric imaging of stellar surfaces during the next years
More distant future: The potential of extremely large telescopes
Local
Organization & Further Information
Dainis Dravins & Hans-Günter Ludwig
dainis@astro.lu.se & hgl@astro.lu.se
Updated May 4, 2001