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arXiv 0906.0605astro-ph.SR
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球状星团年龄的主序列拟合和分离双星:47 Tuc的Case

Globular Cluster Ages from Main Sequence Fitting and Detached, Eclipsing Binaries: The Case of 47 Tuc

Aaron Dotter, Janusz Kaluzny, Ian Thompson

摘要:

年龄的限制最常放在球状星团比较其CMD与理论等时线。最近发现的分离,食双星在这样的系统中的集群双星实验(CASE)提供了新的见解,他们的年龄,并在同一时间,急需测试的恒星演化模型。我们描述的努力模型的分离,食二进制V69在47图克和比较年龄限制来自恒星演化模型的V69 A和B的年龄拟合等时线获得的集群CMD的属性。我们确定,在合理的假设距离,红化,和金属丰度,在何种程度上是可能的,同时限制年龄和他的内容47图克。

英文摘要:

Age constraints are most often placed on globular clusters by comparing their CMDs with theoretical isochrones. The recent discoveries of detached, eclipsing binaries in such systems by the Cluster AgeS Experiment (CASE) provide new insights into their ages and, at the same time, much needed tests of stellar evolution models. We describe efforts to model the properties of the detached, eclipsing binary V69 in 47 Tuc and compare age constraints derived from stellar evolution models of V69A and B with ages obtained from fitting isochrones to the cluster CMD. We determine, under reasonable assumptions of distance, reddening, and metallicity, the extent to which it is possible to simultaneously constrain the age and He content of 47 Tuc.

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。

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