Eruptive Phenomena in Stars [antikvár]

INTRODUCTORY REMARKS The Symposium "Eruptive Phenomena in Stars" was held at Konkoly Observatory, Budapest, from 10-12 September 1985. This biennial symposium of the multilateral co-operation "Stellar Physics and Evolution" was organized by Subcommission No. 3 ("Nonstationary stars") and the host institution. Because one of the primary goals of these symposia is to gather as many astronomers taking part in the co-operative work as possible, the title of the conference was chosen so as to cover a very wide field. The eruptive variables themselves form a very diverse and inhomogeneous bunch of the variable stars. Recently, the fourth edition of the General Catalogue of the Variable Stars (Moscow, 1985) separated the cataclysmic variables from the eruptive (mostly young) ones. The realm of the variable stars, however, is not so simple that any sharp division of the main classes could successfully be applied. Eruptive phenomena do occur in other types of variables as well. The accompanying scheme clearly shows how the eruptive, cataclysmic, pulsating, rotating and eclipsing types of variability co-exist in real variable stars. This figure is the simplest example illustrating that the term "eruptive phenomena" embraces all types of variables in addition to the classical eruptive variables.