SMC Cepheids K-band and RV curves
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The extragalactic distance scale builds on the Cepheid period-luminosity (PL) relation. Decades of work have not yet convincingly established the sensitivity of the PL relation...
河外距离尺度（extragalactic distance scale）以造父变星（Cepheid）的周光（period-luminosity, PL）关系为基础。数十年来的研究尚未能令人信服地确立该周光关系的灵敏度……
