Associations catalog

Associations are essential laboratory resources for our understanding of how young stars are formed, how stars and interstellar matter interact, under what conditions stars form in groups, how these structures are dispersed over time by internal and external factors, how field stars are formed, the evolution of large and low-mass stars within the group, initial mass function, multiple star systems, the evolution of massive and low-mass stars within groups, planetary systems, and their disks. In this master's thesis, a comprehensive catalog of associations and star groups has been made. While creating the list of associations, the Simbad database and the data in the literature were used. As a result, 7.511 groups of associations and stars are listed in the catalog. The distances of the associations in the catalog are between 25 and 8100 pc, and their age is 6.0 < log t (yr) < 9.8. The age range of the associations at d < 150 pc is 6.0 < log t (yr) < 9.1. Generally, only OB associations are considered in catalogs containing associations. In this thesis, T and R type associations given in the literature were also taken into account. Therefore, this thesis will make an important contribution to the literature. When the articles of the associations were examined carefully, it was seen that there were subgroups that were not found in the databases, and these were added to the catalog. Therefore, this catalog provides an important contribution to the literature for researchers who will study the associations in detail.