LMC red giants in D sequence

We present a study of a sample of Large Magellanic Cloud red giants exhibiting Long Secondary Periods (LSPs). We use radial velocities obtained from VLT spectral observations...本研究针对一批呈现长二次周期（Long Secondary Periods，LSPs）的大麦哲伦星系（Large Magellanic Cloud）红巨星样本展开相关研究。本研究使用由甚大望远镜（Very Large Telescope，VLT）光谱观测获取的径向速度（radial velocities）数据……