论文标题
NGC 300中的系统老化方法I：HII区域D118和D119
A systematic aging method I: HII regions D118 and D119 in NGC 300
论文作者
论文摘要
准确地确定H \，{II}区域的年龄及其托管的恒星与具有挑战性一样重要。从历史上看，最受欢迎的方法是与Hertzsprung-Russell图或颜色刻度图图的等质线相拟合。在这里，我们介绍了一种使用BPASS和HOKI确定年龄的不同方法。我们推断区域D118和D119 NGC 300的最可能年龄为log（年龄/年）= 6.86 $^{0.05} _ {0.06} $，我们还根据BPASS模型来推断出恒星的质量和数量计数。我们比较我们的二进制和单星模型的性能，并发现后者无法预测我们样本的20％（$ \ pm $ 10％）。我们还讨论从等异隆拟合获得的结果将有所不同。我们得出的结论是，年龄可能被〜0.2 dex低估，并且等线方法的局限性不仅是由于缺乏二元恒星。我们建议此处介绍的方法更可靠，并且更广泛地适用，因为它可以用于较小的样品。除了这项研究之外，我们还发布了新的Hoki功能，以轻松实现此方法。
Accurately determining the age of H\,{ii} regions and the stars they host is as important as it is challenging. Historically the most popular method has been isochrone fitting to Hertzsprung-Russell Diagrams or Colour-Magnitude Diagrams. Here we introduce a different method for age determination using BPASS and hoki. We infer the most likely ages of the regions D118 and D119 NGC 300 to be log(age/years)=6.86$^{0.05}_{0.06}$ and we also deduce stellar mass and number counts by comparison with the BPASS models. We compare how our binary and single star models perform and find that the latter are unable to predict 20 per cent ($\pm$ 10 per cent) of our sample. We also discuss how results obtained from isochrone fitting would differ. We conclude that ages could be underestimated by ~0.2 dex and that the limitations of the isochrone method is not solely due to the lack of binary stars. We propose that the method presented here is more reliable and more widely applicable since it can be used on smaller samples. Alongside this study, we release new hoki features to allow easy implementation of this method.
