CaII in extragalactic red giants
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Spectroscopic abundance determinations for stars spanning a Hubble time in age are necessary in order to determine unambiguously the evolutionary histories of galaxies. Using...
若要无歧义地厘定星系的演化历史，便需对年龄跨度覆盖哈勃时间（Hubble time）的恒星开展光谱丰度测定。利用……
