A sextet of clusters in the Vela OB2 region revealed by Gaia
| Autor: | Nicholas J. Wright, Giovanni Carraro, Willem-Jan de Wit, Henri M. J. Boffin, V. Kalari, Tereza Jerabkova, Giacomo Beccari, Guido De Marchi |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
010308 nuclear & particles physics Molecular cloud FOS: Physical sciences Astronomy and Astrophysics Astrophysics Vela 01 natural sciences Astrophysics - Astrophysics of Galaxies Photometry (optics) Radial velocity Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences QB460 Cluster (physics) Cluster analysis Parallax 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) QB799 |
| ISSN: | 1365-2966 |
| Popis: | 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. Comment: Accepted for publication as MNRAS letter. 5 pages and 2 figures |
| Databáze: | OpenAIRE |
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