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arxiv: 1807.07073 · v1 · pith:IQ7NSBPQnew · submitted 2018-07-18 · 🌌 astro-ph.SR · astro-ph.GA

A sextet of clusters in the Vela OB2 region revealed by Gaia

Giacomo Beccari , Henri M.J. Boffin , Tereza Jerabkova , Nicholas J. Wright , Venu M. Kalari , Giovanni Carraro , Guido De Marchi , Willem-Jan de Wit This is my paper
classification 🌌 astro-ph.SR astro-ph.GA
keywords clustersgaiaanalysisdataformedgammaregionad-hoc
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Using Gaia DR2 data, combined with OmegaCAM ground-based optical photometry from the AD-HOC survey, and detailed Radial Velocity measurements from ESO-Gaia, we analyse in detail a 10x5 deg region around the Wolf-Rayet star $\gamma^2$ Vel, including the previously known clusters Gamma Vel and NGC2547. Using clustering analysis that considers positions, proper motions and parallax, we discover 6 clusters or associations -- 4 of which appear new. Analysis of the colour-magnitude diagram for these clusters show that 4 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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