论文标题
RR Lyrae和II型Cepheid变量在球状簇中：光学和红外特性
RR Lyrae and Type II Cepheid Variables in Globular Clusters: Optical and Infrared Properties
论文作者
论文摘要
球状簇既是银河进化和形成的原代化石，也是限制低质量和金属贫困恒星进化的理想实验室。 RR Lyrae和II型头孢菌变量是低质量的，径向脉动的星星，可追踪老年恒星种群。球状簇中的这些恒星标准蜡烛对于测量其精确距离至关重要，进而是绝对年龄，以及对外层次距离尺度的校准。在此，讨论了RR Lyrae和II型头孢菌素的进化阶段，其脉动化特性，包括光曲线，颜色 - 质量和周期振幅图以及光学和红外波长的球状簇中的周期 - 流向关系。还详细讨论了涵盖宽金属性范围的球形群集中的RR Lyrae视觉幅度金属关系和多型周期左度金属关系。
Globular clusters are both primary fossils of galactic evolution and formation and are ideal laboratories for constraining the evolution of low-mass and metal-poor stars. RR Lyrae and type II Cepheid variables are low-mass, radially pulsating stars that trace old-age stellar populations. These stellar standard candles in globular clusters are crucial for measuring their precise distances and, in turn, absolute ages, and for the calibration of the extragalactic distance scale. Herein, the evolutionary stages of RR Lyrae and type II Cepheids are discussed, and their pulsation properties, including the light curves, color-magnitude and period-amplitude diagrams, and period-luminosity relations in globular clusters at optical and infrared wavelengths are presented. The RR Lyrae visual magnitude-metallicity relation and the multiband period-luminosity-metallicity relations in globular clusters covering a wide metallicity range are also discussed in detail for their application to the RR Lyrae-based distance~scale.
