Using the Very Large Telescope (VLT), an international team of astronomers conducted
The study showed that NGC 3293 has a normaldistribution of stellar velocities, which reaches a maximum of about 200-250 km/s. Most of them rotate at about 50 to 60% of their critical speed. However, for the more massive members of the cluster, lower rotation rates were observed.
The age of NGC 3293 was estimated at about 20 million years,thus the cluster is older than previously thought. It is now the oldest star cluster in the Carina Nebula complex. The result is based on a realistic distribution of rotation velocities and a detailed correction from star to star to account for the effect of their rotation.
Scientists have suggested that most of the members of this cluster are likely to be low-mass B dwarfs. Astronomers also noted that there are few stars enriched in nitrogen in NGC 3293.
Discovered in 1751, NGC 3293 (also known asThe Gemstone Nebula is an open cluster in the Carina Nebula, approximately 8,400 light-years from Earth. It is one of the most densely populated star clusters in the Carina Nebula region, containing dozens of relatively undeveloped early B-class stars, as well as several blue and red supergiants. Previously, scientists believed that the cluster is very young and about 12 million years old.
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