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Optical Surveys of Young Open Clusters

机译:年轻开放星团的光学测量

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摘要

Wide field optical surveys have been proved to be a key tool to study the population of young open clusters. The avent of very large optical CCD cameras over the past 10 years allowed to obtain a complete census of the stellar population in clusters down to the substellar limit. The high efficiency of the cameras combined to their large FOV enable the survey of several hundreds to thousands cluster members in a limited amount of time, allowing in addition the study of their proper motion and variability.In this contribution I first present recent results on the low mass part of the mass function in open clusters, and discuss whether it depends on local conditions and how it evolves with age. In a second part, I present results obtained by the Monitor project, an unprecedented large scale, high cadence, photometric monitoring survey of young open clusters ideally suited to measure stellar rotation periods and constrain angular momentum evolution models.
机译:广域光学调查已被证明是研究年轻疏散星团数量的关键工具。在过去的10年中,非常大的光学CCD摄像机的问世使整个星团中的恒星种群得以普查,直至星下极限。摄像机的高效率加上其较大的FOV,使得可以在有限的时间内对数百至数千个群集成员进行调查,此外还可以研究其适当的运动和可变性。开放集群中质量函数的低质量部分,并讨论它是否取决于当地条件以及它如何随着年龄而演化。在第二部分中,我介绍了Monitor项目获得的结果,这是对年轻的开放星团进行的前所未有的大规模,高节奏,光度监测调查,非常适合测量恒星旋转周期和约束角动量演化模型。

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  • 作者

    Estelle Moraux; Jerome Bouvier;

  • 作者单位

    Laboratoire d'Astrophysique de Grenoble, Universite Joseph Fourier - CNRS, Grenoble, France;

    Laboratoire d'Astrophysique de Grenoble, Universite Joseph Fourier - CNRS, Grenoble, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天文学;
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