By analyzing the info from the TÜBİTAK Nationwide Observatory and ESA’s Gaia satellite, astronomers have investigated King 6 and NGC 1605—two younger Galactic open clusters. Outcomes of the research, published October 31 on the pre-print server arXiv, ship necessary insights into the properties and nature of those clusters.
Open clusters (OCs), fashioned from the identical big molecular cloud, are teams of stars loosely gravitationally certain to one another. Thus far, greater than 1,000 of them have been found within the Milky Way, and scientists are nonetheless searching for extra, hoping to search out a wide range of these stellar groupings. Increasing the checklist of recognized galactic open clusters and learning them intimately might be essential for enhancing our understanding of the formation and evolution of our galaxy.
Situated within the second Galactic quadrant, King 6 and NGC 1605 are globular clusters studied for many years. Nevertheless, though many observations of those clusters have been performed, a lot of their properties stay unsure or unknown. As an example, there’s a huge discrepancy within the information in terms of the age as some research recommend that King 6 and NGC 1605 could also be as younger as 40 million years, whereas some observations point out that they might be even a number of hundred million years older.
The space to the clusters can also be debated because the outcomes level to 1,500–2,800 light years for King, and three,700–10,800 for NGC 1605.
That’s the reason a group of astronomers led by Sevinc Gokmen of the Florida Atlantic College in Boca Raton, Florida, determined to take a better take a look at these two OCs. For this goal they analyzed the observational data from the 1-m T100 telescope on the TÜBİTAK Nationwide Observatory and from the Gaia Knowledge Launch 3 (DR3).
The group recognized 112 member stars of King 6 and 160 member stars of NGC 1605 by using the Unsupervised Photometric Membership Project in Stellar Clusters (UPMASK) algorithm on the astrometric information from DR3. These stars had been used to estimate astrophysical parameters of the 2 clusters.
The research discovered that King 6 is about 200 million years outdated and is situated roughly 2,360 gentle years away from the Earth. The cluster has a radius of some 6.85 gentle years and its total mass is estimated to be 195 solar lots. The metallicity of King 6 was measured to be at a degree of 0.02 dex.
In relation to NGC 1605, the outcomes point out that the cluster is about 400 million years outdated and situated 9,700 gentle years away. NGC 1605 turned out to be a lot bigger and extra huge than King 6—with a radius of roughly 29 gentle years and a total mass of 623 solar masses. The cluster’s metallicity was discovered to be 0.01 dex.
By analyzing the orbits of King 6 and NGC 1605, the astronomers concluded that each OC belong to the younger thin-disk inhabitants of the galaxy and fashioned outdoors the solar circle. They added that mass segregation is noticed within the two clusters and that they’re each dynamically relaxed.
Extra data:
Gokmen et al, CCD UBV and Gaia DR3 Analyses of Open Clusters King 6 and NGC 1605, arXiv (2023). DOI: 10.48550/arxiv.2311.00054
Journal data:
arXiv
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