roAp星观测和理论研究综述  

Theoretical and Observational Research on Characteristics of roAp Stars

作　　者：史芳菲 张华伟[1,2] 付建宁 SHI Fang-fei;ZHANG Hua-wei;FU Jian-ning(Department of Astronomy,Peking University,Beijing 100871,China;KIAA,Peking University,Beijing 100871,China;Department of Astronomy,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京大学物理学院天文系,北京100871 [2]北京大学科维理天文与天体物理研究所,北京100871 [3]北京师范大学天文系,北京100875

出　　处：《天文学进展》2021年第3期298-317,共20页Progress In Astronomy

基　　金：国家重点研发计划(2019YFA0405504);国家自然科学基金(11973001,11833002)。

摘　　要：roAp星(快速振动的A型化学丰度特殊星)是一类处于主序阶段,表现出非径向高阶p模式振动的脉动变星。随着光学望远镜,尤其是空间光学望远镜的探测能力越来越强,越来越多的roAp星及其所具有的多种脉动模式被观测到,roAp星的观测和理论研究有了快速发展。综述了roAp星元素丰度特殊性、脉动激发理论、观测研究现状,总结了roAp星的观测特征及其星震学研究方面的进展,讨论了脉动激发机制等目前尚未解决的问题。The rapidly oscillating Ap(roAp)stars are pulsating stars locating on the main-sequence,which pulsate in high-overtone,low degree,non-radial p-modes.These stars exhibit magnetic fields and anomalous spectral lines.Their rotations are slow,but the pulsations are fast.With the improved observational capabilities of telescopes,especially the space-based telescopes,more and more roAp stars and their various pulsation modes are detected,which makes the observational and theoretical study of roAp stars developing rapidly.Studies of the pulsation may provide the information of the roAp stars’rotation periods,rotation inclinations,magnetic geometries and magnetic field strengths.In addition,these studies help to reveal the mechanisms of pulsations and chemical peculiarities.In this paper,the peculiarity properties,pulsation excitation theories,and observational efforts of roAp stars are summarized,and some open questions including pulsation excitation mechanisms,pulsation mode selection and the distribution on the HR diagram are discussed.

关 键 词：roAp星 恒星脉动 星震学 

分 类 号：P145.2[天文地球—天体物理]