论文标题
使用周期彩色关系的脉动变量中恒星光球电离前相互作用的研究
A study of the stellar photosphere-hydrogen ionisation front interaction in pulsating variables using period-color relations
论文作者
论文摘要
周期（PC）关系可用于研究恒星光球和氢电离前（HIF）的相互作用。发现RR Lyraes（RRL）和长期经典的头孢虫（P> 10D）以最小和最大的光表现出不同的PC行为，可以通过HIF光层相互作用来解释基于其HR图上的位置。在这项工作中，我们将研究扩展到包括II型头孢菌素（T2C），目的是在各种可变的恒星类型上测试HIF光层相互作用理论。我们发现W Vir恒星和BL她的恒星分别具有与长期和短期经典头孢虫相似的PC关系。我们还使用MESA来计算RRL，BL她和经典的头孢虫模型来研究理论HIF光层距离，并发现结果与HIF光层相互作用理论相当一致。
Period-color (PC) relations may be used to study the interaction of the stellar photosphere and the hydrogen ionization front (HIF). RR Lyraes (RRLs) and long period classical Cepheids (P > 10d) have been found to exhibit different PC behavior at minimum and maximum light which can be explained by the HIF-photosphere interaction based on their location on the HR diagram. In this work, we extend the study to include type II Cepheids (T2Cs) with an aim to test the HIF-photosphere interaction theory across a broad spectrum of variable star types. We find W Vir stars and BL Her stars to have similar PC relations as those from long period and short period classical Cepheids, respectively. We also use MESA to compute RRL, BL Her and classical Cepheid models to study the theoretical HIF-photosphere distance and find the results to be fairly consistent with the HIF-photosphere interaction theory.
