FSR星表中候选星团的NTT跟踪观测
NTT follow-up observations of star cluster candidates from the FSR catalogue
摘要：
我们正在进行一项大型计划，从Froebrich，Scholz和Raftery（2007）的列表中对新发现的银河系星团候选者进行分类。在这里，我们提出了来自ESO/NTT的14个星团候选者的深NIR后续观测。我们表明，来自深近红外成像的恒星密度图和颜色-颜色/星等图的综合分析是一个可行的工具，可靠地分类新的星团。这使我们能够在我们的目标中识别出两个拥有大质量恒星的年轻星团，三个中等年龄的疏散星团和两个球状星团候选者。剩下的7个天体不太可能是星团。其中FSR 1767是Bonatto等人（2007年）使用2 MASS数据确认的球状星团。我们的新分析表明FSR 1767不是一个星团。我们还总结了目前可用的后续分析的FSR候选人，并得出结论，该目录可能包含大量的新的星团，可能占主导地位的老疏散星团。
英文摘要：
We are conducting a large program to classify newly discovered Milky Way star cluster candidates from the list of Froebrich, Scholz & Raftery (2007). Here we present deep NIR follow-up observations from ESO/NTT of 14 star cluster candidates. We show that the combined analysis of star density maps and colour-colour/magnitude diagrams derived from deep near-infrared imaging is a viable tool to reliably classify new stellar clusters. This allowed us to identify two young clusters with massive stars, three intermediate age open clusters, and two globular cluster candidates among our targets. The remaining seven objects are unlikely to be stellar clusters. Among them is the object FSR1767 which has previously been identified as a globular cluster using 2MASS data by Bonatto et al. (2007). Our new analysis shows that FSR1767 is not a star cluster. We also summarise the currently available follow-up analysis of the FSR candidates and conclude that this catalogue may contain a large number of new stellar clusters, probably dominated by old open clusters.
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