Stars and Star Systems : Proceedings of the Fourth European Regional Meeting in Astronomy Held in Uppsala, Sweden, 7–12 August, 1978

The 4th European Regional Meeting in Astronomy, entitled "Stars and Star Systems", was held in Uppsala, Sweden, on August 7 -12, 1978. It was attended by 228 participants from 24 countries. Over 100 papers were presented; this required parallel sessions throughout the Meeting. Financial support was given by the IAU, the Swedish Department of Education, the Swedish Natural Science Research Council, the Swedish Institute and the University of Uppsala. The members of the Scientific and Local Organizing Committees are listed below, and I thank all of them for their contributions to the Meeting. The Meeting was divided into six sections, according to the scien­ tific topics: Galaxies (A) - including galactic structure and star for­ mation; High-Energy Astrophysics (B); Stars (C); Interstellar Processes (D); Astronomical Instrumentation (E) and Education in Astronomy (F). In each section a number of Invited Papers were presented as well as a large number of contributed papers. In addition, each day a General Lecture was given by an Invited Speaker. The present volume contains all the General Lectures and all the Invited Papers presented during the Meeting. In three cases, however, and for various reasons, only brief summaries have been available. Abstracts of the contributed papers may be found in Uppsala Astronomical Observatory, Report No. 12. Front Matter....Pages i-xviii Gamma-Ray Sources: A Puzzle, or a Piece of the Puzzle?....Pages 1-13 Compact Radio Sources (Summary)....Pages 15-15 Chemical Evolution of Galaxies....Pages 17-31 High-Energy Phenomena on the Solar Surface....Pages 33-50 Grain Mantle Photolysis: A Connection between the Grain Size Distribution Function and the Abundance of Complex Interstellar Molecules....Pages 173-193 Properties Of H II Regions....Pages 195-220 Detection of Optical Images....Pages 221-234 The Teaching of Astronomy to the Swedish People....Pages 235-247 Observational and Theoretical Aspects of Gas in Early Type Galaxies....Pages 51-66 Radiative Continuum Sources and Dense Line Region in Seyfert Type I Galaxies and Broad Line Radio Galaxies....Pages 67-80 The Density-Wave Theory of Spiral Galaxies -Comparison between Theory and Observations....Pages 81-83 Star Formation and Galactic Structure....Pages 85-103 Recent Results on Galactic X-Ray Sources....Pages 105-105 On the Activity of the Nuclei of Galaxies....Pages 107-122 Matter Distribution — X-Ray Emission from Clusters of Galaxies....Pages 123-133 Colour Systems and Models of Stellar Atmospheres....Pages 135-153 Mass Loss and Stellar Evolution....Pages 155-171 Back Matter....Pages 249-267 Proceedings of the 4th European Regional Meeting in Astronomy, held in Uppsala, Sweden, August 7-12, 1978