Using the Tubitac National Observatory (TUG) and the European Space Agency's Gaia satellite,
Open clusters (OCs) formed from oneand the same giant molecular cloud, are groups of stars weakly gravitationally connected to each other. To date, more than 1,000 of them have been discovered in the Milky Way, and scientists are still searching for more, hoping to find many of these star groupings. Studying them in detail could be critical to improving our understanding of the formation and evolution of our galaxy.
Berkeley 68 is located at a distance of about 11,000light years, its age is 2.1 billion years. It contains at least 1,200 stars and exhibits a low concentration of stars at its center. As for Stock 20, this cluster is located at a distance of about 8,500 light years in the second galactic quadrant. Its age is estimated at 19 million years.
Identification map of stars located in the regions of Berkeley 68 (a) and for Stock 20 (b).
Credit: Yontan, arXiv (2022). DOI: 10.48550/arxiv.2211.09825
First of all, scientists have determined the limitcluster radii for two PCs. It turned out that they are 22.8 and 20.7 light years for Berkeley 68 and Stock 20, respectively. After this, astronomers identified 198 stars in Berkeley 68 and 51 stars in Stock 20.
The study found that Berkeley68 is older and closer than previously thought. Its distance and age turned out to be approximately 9,800 light years and 2.4 billion years, respectively. Astronomers also concluded that Berkeley 68 is at a level of −0.13 and was formed within a radius of about 33,000 light years from the galactic center, a relatively metal-poor region of the Milky Way.
The results show that Stock 20 is located at a distance of about 9,500 light years and is 50 million years old. The metallicity of PC is around −0.01.
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On the cover: Galaxy C153 disintegrates as it travels through space and loses most of its own gas.
Illustration: NASA/Adolf Schaller