Estimating [Fe/H] of RR Lyrae using Gaia DR3

RR Lyrae stars (RRLs) are old population pulsating variables that serve as useful metallicity tracers due to the correlation between their metal abundances and the shape of...天琴座RR型变星（RR Lyrae stars，缩写为RRLs）是一类老年星族脉动变星，由于其金属丰度与……的形态之间存在相关性，因此可作为有效的金属丰度示踪剂。