Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/institute/smo/events/colloquia/2008/ColloquiaJune4Fall.pdf Дата изменения: Unknown Дата индексирования: Wed Feb 6 01:43:06 2013 Кодировка: Поисковые слова: molecular cloud

Refreshments at 3:15 PM, Talks at 3:30 PM in the John N . Bahcall Audit orium www.stsci.edu/inst itute/sd/talks/C olloquia for updates

Wednesday June 4, 2008
Michael Fall, Space Telescope Science Institute

This talk will present a comprehensive picture of the life cycles of star clusters, from their birth in molecular clouds to their dissolution in the field (unclustered) stellar population. Our picture is motivated by recent observational studies (mostly with HST) of the clusters of different masses and ages in several nearby galaxies of different types (dwarf, giant, interacting, quiescent). Underlying the apparent diversity and complexity of these cluster systems, we find some intriguing regularities. These in turn lead us to a quantitative description of the cluster systems in terms of a simple empirical rule and a simple dynamical model, which are the main focus of this talk. This new picture revises several cherished beliefs in this field. We conjecture that it describes, at least approximately, the life cycles of most if not all star clusters (open, globular, proto-, super-, etc) in most if not all galaxies.