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VVV Study of the Young Milky Way Star Clusters: Mercer 35, 69 and 70

机译:年轻银河系星团的VVV研究:Mercer 35、69和70

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Young massive clusters are usually deeply embedded in dust and gas. They represent excellent astrophysical laboratories for revealing the enigma of star formation processes and the early stages of stellar evolution. Wide-field infrared surveys are a modern tool for studying hidden clusters. "Vista variables in Via Lactea - VVV" (Minniti et al. New Astron. 15:433, 2010) is an ESO/Chile/VISTA public deep near-IR survey, covering the Galactic Bulge and Southern Galactic disk. This is the next step of our systematic study of the cluster content of the inner Milky Way. Here we present our first analysis of the young hidden clusters Mercer35, 69 and 70. It is based on VVV and SOFT/NTT JHK_s photometry and follow-up MR spectroscopy. All of the investigated clusters are young (t ≤10Myr). The basic cluster parameters are obtained from photometry. The follow-up spectroscopy of probable cluster members shows that the brightest star in Mercer 35 presents characteristics of a red supergiant!
机译:年轻的大型星团通常深深地嵌入尘埃和气体中。它们代表了揭示天体形成过程和恒星演化早期阶段之谜的出色天体实验室。宽视场红外勘测是研究隐藏星团的现代工具。 “ Via Lactea中的Vista变量-VVV”(Minniti等人,New Astron。15:433,2010)是ESO /智利/ VISTA公开的深红外公开调查,涵盖了银河膨胀和南银河盘。这是我们对内银河系星团内容进行系统研究的下一步。在这里,我们介绍了对年轻的隐聚簇Mercer35、69和70的首次分析。它是基于VVV和SOFT / NTT JHK_s光度法和后续MR光谱法进行的。所有研究的星团都是年轻的(t≤10Myr)。基本的簇参数是从光度学获得的。可能的团簇成员的后续光谱显示,Mercer 35中最亮的恒星表现出红色超巨星的特征!

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