High-resolution spectra of Achernar

Achernar, the closest and brightest classical Be star, presents rotational flattening, gravity darkening, occasional emission lines due to a gaseous disk, and an extended polar...水委一（Achernar）是距离地球最近且亮度最高的经典Be星（classical Be star），其呈现出自转扁化、引力暗化现象，偶发由气态星盘产生的发射线，以及延展的极区……