标题： 长周期变星作为盖亚和LSST时代的距离和年龄指示器 显示英文标题

标题： Long-Period Variables as distance and age indicators in the era of Gaia and LSST

摘要： 长周期变星是明亮的演化红巨星，由于恒星脉动而表现出周期性的光度变化。 它们遵循一个或多个周光关系和周龄关系，这使它们成为极具前景的距离指示器和年轻及中间年龄恒星群体的示踪体。 鉴于现代大规模变率巡天提供的海量数据，这种潜力尤为引人注目。 关键的是，这些应用需要对脉动物理与恒星演化之间的联系有清晰的理论理解。 在这里，我描述了我们合作正在进行的一项工作，致力于演化恒星脉动建模，以及这项工作如何影响我们研究长周期变星并将其用于其他天体物理学研究的能力。 此外，我介绍了我们正在进行的工作，旨在评估半规则变星（长周期变星的一个常被忽视的亚类）作为距离指示器的潜力，以补充其更为人所知且更进化的表型——米拉变星。 显示英文摘要

摘要： Long-period variables are bright, evolved red giant stars showing periodic photometric changes due to stellar pulsation. They follow one or more period-luminosity and period-age relations, which make them highly promising distance indicators and tracers of young and intermediate-age stellar populations. Such a potential is especially interesting in view of the massive amount of data delivered by modern large-scale variability surveys. Crucially, these applications require a clear theoretical understanding of pulsation physics in connection with stellar evolution. Here, I describe an ongoing effort from our collaboration dedicated to the modelling of stellar pulsation in evolved stars, and how this work is impacting our capability of investigating long-period variables and exploiting them for other astrophysical studies. Furthermore, I present our ongoing work aimed at assessing the potential of semi-regular variables, an often neglected sub-type of long-period variables, to be distance indicators complementary to their better-known, more evolved counterparts, the Mira variables.