Reviews in Modern Astronomy

Description

The yearbook series Reviews in Modern Astronomy of the Astronomische Gesell­ three years ago in order to bring the scientific events schaft (AG) was established of the meetings of the society to the attention of the worldwide astronomical community. Reviews in Modern Astronomy is devoted exclusively to the invited reviews, the Karl Schwarzschild lectures, and the highlight contributions from leading scientists reporting on recent progress and scientific achievements at their research institutes. Volume 4 comprises all, eighteen contributions which were presented during the fall meeting of the AG at Preiburg/Breisgau in September 1990. They cover problems in solar research and the solar system as well as the first results of the ROSAT and Hipparcos space missions, stellar and extragalactic studies, and Supernova 1987A in the Large Magellanic Cloud. The Karl Schwarzschild Medal was awarded to Professor Eugene Parker1. His lecture entitled "Convection, Spontaneous Discontinuities, and Stellar Winds and X-Ray Emis·sion" begins this volume. Front Matter....Pages I-VIII Convection, Spontaneous Discontinuities, and Stellar Winds and X-Ray Emission....Pages 1-17 The Sun as a Prototype in the Study of Stellar Magnetic Activity....Pages 18-42 Hydrodynamics of the Solar Photosphere: Model Calculations and Spectroscopic Observations....Pages 43-60 Solar Spectroscopy with a 100 × 100 Diode Array....Pages 61-68 Solar Research at Potsdam: Papers on the Structure and Dynamics of Sunspots....Pages 69-89 Time-Resolved Stokes V Polarimetry of Small-Scale Magnetic Structures on the Sun....Pages 90-103 Instabilities in Astrophysical Shear Flows....Pages 104-116 Simultaneous Observations with a Tunable Filter and the Echelle Spectrograph of the Vacuum Tower Telescope at Tenerife....Pages 117-125 Aspects of the Present Heliospheric Research....Pages 126-144 Turbulence in the Solar Wind....Pages 145-156 Dust Rings Around Planets....Pages 157-164 Asteroid-Asteroid Interactions - Dynamically Irrelevant?....Pages 165-172 First Results from the X-Ray Astronomy Mission ROSAT....Pages 173-187 TYCHO/HIPPARCOS A Successful Mission! First Results and Further Improvements....Pages 188-196 Shock Waves in Accretion Disks....Pages 197-207 Magnetic Field Measurements on Cool Stars....Pages 208-232 The Expanding Envelope of Supernova 1987A in the Large Magellanic Cloud....Pages 233-259 Dynamos in Galaxies....Pages 260-286 Back Matter....Pages 287-287