2050 red giants CaII EWs

Globular clusters are some of the oldest bound stellar structures observed in the Universe. They are ubiquitous in large galaxies and are believed to trace intense...球状星团（Globular clusters）是宇宙中迄今观测到的最古老的受引力束缚恒星结构之一。它们在大型星系中广泛分布，且被认为可用于示踪高强度的……