Primordial Open Cluster Groups: The Role of Supernovae in Star Formation
Liu et al. (2025) identified four new open cluster (OC) groups using Gaia data and found evidence that supernova explosions triggered the formation of two groups (G1 and G2). Their simulations show OC groups gradually disperse over time. A clear age gradient and pulsar trajectories support the supernova-triggered star formation hypothesis. These findings reinforce the hierarchical star formation model, highlighting the role of stellar feedback in shaping star clusters in the Milky Way.
Unlocking the Secrets of Star Cluster UPK 220 with Gaia and TESS
The study analyzes open star cluster UPK 220 using Gaia DR3 and TESS data, identifying eight variable stars, including eclipsing binaries and pulsating stars. By combining these findings with stellar models, the team determined the cluster’s distance (832 parsecs), age (200 million years), and metal-poor composition, refining previous estimates.
Unveiling the Power of Young Star Clusters with Gaia's Help
Young star clusters release energy through stellar winds, potentially driving cosmic ray production and gamma-ray emission. Using Gaia DR2 data, researchers estimated the mass and wind luminosity of 387 clusters, finding values up to significant particle acceleration and gamma-ray production. This study highlights the role of stellar winds in high-energy astrophysics and provides a foundation for further exploration of particle acceleration in the galaxy.