关于星暴星系IC10的恒星含量
On the stellar content of the starburst galaxy IC10
摘要：
我们调查的恒星内容的星暴矮星系IC 10使用精确和深的光学数据收集的高级相机的调查和宽视场行星相机2上的哈勃太空望远镜。理论和观测结果的比较表明，从中心向外部区域移动时，年龄分布发生了明显的变化。此外，经验校准器和进化预测表明，存在一个蔓延的重元素丰度的订单的一半德克斯。旧的和中间年龄的核心氦燃烧模型之间的比较，在颜色-星等图中有一个很好的定义过密度表明存在的中间年龄，红色的团块星和旧的，红色的水平分支星。
英文摘要：
We investigate the stellar content of the starburst dwarf galaxy IC10 using accurate and deep optical data collected with the Advanced Camera for Surveys and with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. The comparison between theory and observations indicates a clear change in age distribution when moving from the center toward the external regions. Moreover, empirical calibrators and evolutionary predictions suggest the presence of a spread in heavy element abundance of the order of one-half dex. The comparison between old and intermediate-age core He-burning models with a well defined overdensity in the color-magnitude diagram indicates the presence of both intermediate-age, red clump stars and of old, red horizontal branch stars.
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