LMC classical Cepheids Fe and O content
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Classical Cepheids are primary distance indicators and a crucial stepping stone to determining the present-day value of the Hubble constant Ho to the precision and accuracy...
经典造父变星（Classical Cepheids）是一级距离指示器，也是以高精度与准确度测定哈勃常数（Hubble constant, H₀）现今数值的关键阶梯性步骤……
