arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1807.07073astro-ph.SRastro-ph.GA
收藏

盖亚揭示的船帆座OB2区域的六重星系团

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

摘要:

使用盖亚DR 2数据,结合来自AD-HOC调查的OmegaCAM地基光学测光,以及ESO-Gaia的详细径向速度测量,我们详细分析了Wolf-Rayet恒星$γ^2$ Vel周围的10 x5度区域,包括以前已知的星团Gamma Vel和NGC 2547。使用聚类分析,考虑位置,自行和视差,我们发现6个集群或协会-其中4个出现新的。对这些星团的色星等图的分析表明,其中4个星团是在1000万年前由同一分子云共同形成的,而NGC 2547则是在3000万年前与新发现的星团一起形成的。这项研究显示了盖亚为研究年轻的星团提供的令人难以置信的丰富数据。

英文摘要:

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 $γ^2$ 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑