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Chromospheric Activity and Lithium Abundance in NGC2516

机译:NGC2516中的大气层活动性和锂丰度

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We present new measurements of lithium abundance and chromospheric activity in the NGC2516 open cluster using FLAMES-VLT archive data. These supplement existing data and provide new information on the spread of lithium abundance and the chromospheric activity index R'_(HK)at approximately the Pleiades age. Comparison with theoretical models and with other observational data for the lithium abundances of NGC2516 shows that the hotter stars in our sample have a higher lithium depletion than average. Finally, the chromospheric activity index R'_(HK) compared to other know cluster data, seems to give a lower chromospheric age than the one provided from lithium abundance.
机译:我们使用FLAMES-VLT存档数据介绍了NGC2516开放星团中锂丰度和色球活动的新测量值。这些补充了现有数据,并提供了大约approximately宿星年龄的锂丰度分布和色球活性指数R'_(HK)的新信息。与NGC2516锂丰度的理论模型和其他观测数据的比较表明,我们样品中较热的恒星具有比平均更高的锂耗竭。最后,与其他已知簇数据相比,色球活性指数R'_(HK)似乎比从锂丰度提供的色球年龄低。

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    Dipartimento di Fisica e Astronomia, Sezione Astrofisica, Universita di Catania,INAF - Osservatorio Astrofisico di Catania, Via S. Sofia 78,95123 Catania, Italy;

    Dipartimento di Fisica e Astronomia, Sezione Astrofisica, Universita di Catania,INAF - Osservatorio Astrofisico di Catania, Via S. Sofia 78,95123 Catania, Italy;

    INAF - Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, Italy;

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