论文标题
部分可观测时空混沌系统的无模型预测
Difference of photometric properties between regular and non-regular Miras in the Magellanic Clouds
论文作者
论文摘要
MIRA变量是渐近巨型分支脉动恒星，具有较长的脉动周期，并且光条中的幅度较大。通过将随机森林算法应用于麦芽岩云中MIRAS的I带光曲线，我们将这些MIRAS分类为常规MIRAS和非规范MIRAS。其中非规范的MIRA在其主要脉动周期外还表现出长期变化。我们的结果证实，最大光的周期间度关系具有较小的分散体，但仅发生在常规氧（富含氧气的MIRAS）上，我们建议将其应用于将来的距离尺度工作。我们还收集了这些MIRAS的多频段光度法，以用恒星和灰尘成分进行光谱 - 能量分布（SED）拟合，表明在非规范MIRAS周围存在很大一部分灰尘。根据我们的结果，我们认为在非规范MIRA中看到的周期性长期变化可能是由于存在灰尘所致。
Mira variables are asymptotic giant branch pulsating stars with long pulsation periods and large amplitudes in optical bands. By applying the random forest algorithm to the I-band light curves for the Miras in the Magellanic Clouds, we have classified these Miras into regular Miras and non-regular Miras. Wherein non-regular Miras exhibit a long-term variation in addition to their primary pulsation periods. Our results confirm that the period-luminosity relation for maximum light has a smaller dispersion, but only occurs on the regular oxygen-rich (O-rich) Miras, which we recommend to be applied in future distance scale work. We have also collected multi-band photometry for these Miras to perform a spectral-energy-distribution (SED) fitting with stellar and dust components, showing that a significant fraction of dust is present around the non-regular Miras. According to our results, we believe that the periodic long-term variations seen in the non-regular Miras might be due to the presence of dust.
