From Observations to Self-Consistent Modelling of the ISM in Galaxies

Research of the interstellar medium (ISM) has been advancing rapidly during the last 10 years, mainly due to immensely improved observational facilities and techniques in all wavelength ranges. We are now able to investigate the ISM in external galaxies and even the intergalactic and intracluster medium in great detail. Increased spatial and spectral resolution have provided us with a great deal of information on the interstellar gas in its various phases, the magnetic field and the cosmic rays, and of course, also the stellar component, which is the driving agent of the interstellar matter cycle. Since only fairly recently, a sufficient amount of computing power has become available to tackle these problems with some prospect of obtaining a self-consistent picture of the ISM, a major goal of this workshop was to bring together observers and theoreticians sufficiently close, so that intense discussions about the necessities and desiderata of modelling the ISM could be stimulated. Observers have shown in great detail on this conference of what is seen on all scales of the ISM, near and far, and what boundary conditions would be appropriate for realistic models, and theoreticians pointed out what assumptions and simplifications their codes need, and how future observations could test their models. As a first step towards this goal, some self-consistent numerical simulations with a minimum number of relevant physical processes were also presented on this meeting. There was wide agreement, that this approach - to keep observers and theoreticians in close contact and also in sometimes quite controversial discussions - will bear fruitful results in the near future.

Preface. 0. Opening Talk. The Need for a Self-Consistent Picture of the ISM; J.N. Bregman. 1. Interstellar Matter in Galaxies. An Observer's Overview of the Galactic Interstellar Medium; D.G. York. Probing the IRC + 10° 216 Circumstellar Envelope Using Spectroscopic Observations of Background Stars; T. Kendall. Volume Filling Factors of the DIG in M31; E.M. Berkhuijsen. Comparing the CO and HI Distributions in Nearby Spiral Galaxies at High Resolution; T. Wong. Evidence and Implications of Pressure Fluctuations in the ISM; E. Jenkins. D/O and D/H Ratios in the Local Interstellar Medium from FUSE Observations; G. Hébrard. X-rays from the Local Bubble; M.J. Freyberg. Gas as a Tracer of the Galactic Potential; P.M.W. Kalberla. Molecular Clouds, Formation and Disruption; J. Ballesteros-Paredes. The KOSMA Large-scale CO Survey of Clouds in the Galactic Molecular Ring; M. Brüll. The Structure of Molecular Clouds from PC to AU Scale; J. Alves. Molecular Cloud Formation in Disk Galaxies: The Case of M33; E. Roslowsky, L. Blitz. Superbubble Activity in Star-Forming Galaxies; M.S. Oey. HI Shells in the Leiden-Dwingeloo HI Survey; S. Ehlerová, et al. SNR Surface Density Distribution in Nearby Galaxies; M. Sasaki, et al. Kinematics of Giant H II Regions in Nearby Galaxies; H. Plana, et al. 2. Turbulence, Magnetic Fields and CRs. The Role of Magnetic Fields in Spiral Galaxies; R. Beck. Building the Fast Galactic Dynamo; M. Hanasz, et al. Magnetic Reconnection and Turbulent Mixing: From ISM to Clusters of Galaxies; A. Lazarian, et al. The Effects of Spiral Arms on the Multi-Phase ISM; A. Shukurov, et al. Turbulence in the Interstellar Medium - Energetics and Driving Mechanisms; M.-M. Mac Low. Molecule Destruction and Formation in Molecular Clouds; M.D. Smith, et al. Cosmic Rays and Galactic Winds; E.A. Dorfi. 3. Extraplanar ISM and IGM. Diffuse Ionized Gas in Halos of Spiral Galaxies; R.-J. Dettmar. Magnetic Reconnection and Extraplanar Diffuse Ionized Gas; G. Birk, et al. The Thin Layer of Warm Ionized Gas: Towards a 3-D Reconstruction of the Spatial Distribution of HII Regions; R. Paladini, et al. X-ray Halos in Galaxies; G. Trinchieri. The HI Halo of Spiral Galaxies; F. Fraternali, et al. Recent Developments Concerning High-Velocity Clouds; B.P. Wakker. Dynamical Evolution of High-Velocity Clouds; C. Konz, et al. Infall of Gas in Galaxies and Triggered Star Formation; F. Comerón. Starburst galaxies - An Observer's View; M. Dahlem. Mid-Infrared Properties of Early-Type Galaxies; E.M. Xilouris, et al. Gas in Groups and Clusters of Galaxies; S. Schindler. 4. Self-Consistent Modelling of the ISM. Chemo-dynamical Evolution of the ISM in Galaxies; S. Harfst. Non-Instantaneous Gas Recycling and Chemical Evolution in N-body Disk Galaxies; B. Jungwiert, et al. The Interplay between ISM, Star Formation and Galaxy Evolution; M. Samland. Modelling the Turbulent Magnetized ISM; M.J. Korpi. Thermal Instability in Turbulent Models of the Interstellar Medium; Gazol, et al. On the Thermal Instability in Numerical Models of the Interstellar Medium; S. Dib, et al. In ISM Modeling, The Devil is in the Details: You Show Me Your OVI and I'll Show You Mine; D.P. Cox. Large to Small Scales: Global Models of the ISM; M.A.de Avillez. Self-Consistent Modelling of the Interstellar Medium; D. Breitschwerdt. 3.3. Posters. 1. The Magnetic Buoyancy Instability in Partially Ionized Plasmas; G.T. Birk. 2. The Effervescent Disk of NGC 6946; R. Boomsma, et al. 3. Chandra X-Ray Observation of NGC 604; F. Damiani, et al. 4. The Quest for Halo Emission in the Starburst Galaxie NGC 1511; M. Ehle, M. Dahlem. 5. Stellar Input Spectra as a Significant Parameter in Simulations of the Diffuse Ionized Gas; T. Elwert, R.-J. Dettmar. 6. EVN Observations of H2O Masers towards the High-Mass, Young Stellar Object AFGL5142; C. Goddi, et al. 7. 3D MHD Modeling of the Gaseous Structure of the Galaxy; Gómez, Cox. 8. Simulation of ESEs by Kolmogorov Turbulence in the Ionized ISM; Hamidouche. 9. Extinction and Distance from a Tycho-2 Calibration of Michigan Dwarfs. LDN 1622, a nearby Molecular Cloud?; Knude, Fabricius. 10. Parker Instability under the Influence of Cooling and Heating Processes in the ISM; R. Kosińshi, M. Hanasz. 11. Parker Instability, Resistivity and Magnetic Diffusion in Galactic Disks; Kowal, et al. 12. 3-D Simulations of Galactic Winds in Dwarf Galaxies; Marcolini, et al. 13. Extreme and Far UV Spectroscopic Observations of the ISM; Montero-Castaño, et al. 14. High-Resolution CO(1-0) Survey of the Andromeda Galaxy; C. Nieten, et al. 15. Topological Evolution of Parker Unstable Galactic Magnetic Fields, Turbulent EMF Calculations; Otmianowska-Mazur, et al. 16. Open Cluster Distance Scales and the Chemical Evolution of the Galaxy; Pylskaya, Wiebe. 17. Hydrodynamic Simulations of Expanding Shells - The Gravitational Instability; Wünsch, et al.