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Beccari, Giacomo; Boffin, Henri M J; Jerabkova, Tereza; Wright, Nicholas J; Kalari, Venu M; Carraro, Giovanni; De Marchi, Guido; de Wit, Willem-Jan
Monthly notices of the Royal Astronomical Society. Letters, 11/2018, Volume: 481, Issue: 1Journal Article
ABSTRACT Using Gaia DR2 data, combined with OmegaCAM ground-based optical photometry from the Accretion Disc with OmegaCAM survey, and detailed radial velocity measurements from ESO-Gaia, we analyse in detail a 10 × 5 deg region around the Wolf–Rayet Star γ2 Vel, including the previously known clusters Gamma Vel and NGC2547. Using clustering analysis that considers positions, proper motions, and parallax, we discover six clusters or associations – four of which appear new. Analysis of the colour–magnitude diagram for these clusters shows that four of them formed coevally from the same molecular clouds 10 Myr ago, while NGC 2547 formed together with a newly discovered cluster 30 Myr ago. This study shows the incredible wealth of data provided by Gaia for the study of young stellar clusters.
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