论文标题
具有经典脉动星的高精度距离测量
High-precision distance measurements with classical pulsating stars
论文作者
论文摘要
经典的头孢虫和RR Lyrae变量分别是径向脉动的星星，分别追踪年轻和老年恒星种群。这些经典的脉动恒星是精确恒星天体物理学和外层距离测量值的最敏感探针。尽管由于其定义明确的周期亮度关系，它们广泛用作标准蜡烛，但基于这些物体的距离测量值却遭受了它们的绝对主要校准，金属性效应和其他系统的不确定性。在这里，我介绍了经典Cepheid，RR Lyrae和II型头孢虫变量的评论，从历史介绍开始，并描述了它们的基本进化和脉动特性。我将重点介绍最近的理论和观察性努力，以在多个波长下为这些标准蜡烛建立绝对规模。这些经典的脉动恒星在高精度宇宙距离尺度上的应用将与观察系统一起讨论。我将以进一步的改进来总结，以进一步改善我们在即将到来的极大望远镜时代对这些古典脉动器的理解。
Classical Cepheid and RR Lyrae variables are radially pulsating stars that trace young and old-age stellar populations, respectively. These classical pulsating stars are the most sensitive probes for the precision stellar astrophysics and the extragalactic distance measurements. Despite their extensive use as standard candles thanks to their well-defined Period-Luminosity relations, distance measurements based on these objects suffer from their absolute primary calibrations, metallicity effects, and other systematic uncertainties. Here, I present a review of classical Cepheid, RR Lyrae, and Type II Cepheid variables starting with a historical introduction and describing their basic evolutionary and pulsational properties. I will focus on recent theoretical and observational efforts to establish absolute scale for these standard candles at multiple wavelengths. The application of these classical pulsating stars to high-precision cosmic distance scale will be discussed along with observational systematics. I will summarize with an outlook for further improvements in our understanding of these classical pulsators in the upcoming era of extremely large telescopes.
