Ks photometry of LMC RR Lyrae

RR Lyrae variable stars are the primary Population II distance indicator. Likewise, the LMC constitutes a key step in the extragalactic distance scale. By combining near-IR...天琴座RR型变星（RR Lyrae variable stars）是星族II（Population II）的首要距离指示器。与之类似，大麦哲伦星系（Large Magellanic Cloud，缩写LMC）是河外距离阶梯中的关键环节。通过结合近红外（near-IR）……