By Helen Sawyer Hogg (auth.), J. D. Fernie (eds.)
This quantity includes the papers and discussions at IAU Colloquium No. 21 on Variable Stars in Globular Clusters and in comparable structures held in Toronto at the twenty ninth, thirtieth and thirty first August 1972. It used to be the goal of the organizers that this assembly should still honour the existence lengthy paintings during this box of Professor Helen Sawyer Hogg. She has been consistently lively in observational examine on variables in globular clusters for forty six years and her catalogues and bibliographies in addition to her learn papers, assessment articles and IA U stories as chairman of the committee on variable stars in clusters are of primary value to all employees during this box. The scope of the colloquium lined either observational and theoretical elements of the matter, together with the connection of variables to non-variable cluster contributors, the location of the variables within the HR diagram and their value for difficulties of stellar evolution, empirical facts at the variables, classes and interval adjustments, and the proper components of pulsation idea. The assembly was once really profitable in bringing jointly observers and theorists. it is going to have accomplished its item if it has proven either observers and theorists that are the issues most fitted for assault this present day. The assembly truly proven the nice value of analysis on variables in globular clusters and comparable platforms for our realizing either one of stellar evolution and stellar pulsation.
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