RR Lyrae candidates in the MW outer halo

RR Lyrae stars are ideal massless tracers that can be used to study the total mass and dark matter content of the outer halo of the Milky Way (MW). This is because they are easy...天琴座RR型变星（RR Lyrae stars）是理想的无质量示踪天体，可用于研究银河系（MW）外晕的总质量与暗物质组分。究其原因，这类天体易于……