NO HEAVY-ELEMENT DISPERSION IN THE GLOBULAR CLUSTER M92
NO HEAVY-ELEMENT DISPERSION IN THE GLOBULAR CLUSTER M92
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球状星团 M92 中没有重元素弥散
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
J. Cohen
中科院分区：
文献类型：
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作者：
J. Cohen
虽然最近有人声称，有一个大的分散在旧的银河系球状星团M92的重中子俘获元素的丰度，我们表明，测量的分散度的绝对丰度的4个稀土元素内的12个发光红巨星在M92（10.07 dex）的样本不超过相关的不确定性来源。正如以前的研究所预期的那样，重元素显示出r过程的特征。它们的丰度比基本上与附近另一个金属丰度相似的球状星团M30相同。
Although there have been recent claims that there is a large dispersion in the abundances of the heavy neutron capture elements in the old Galactic globular cluster M92, we show that the measured dispersion for the absolute abundances of four of the rare earth elements within a sample of 12 luminous red giants in M92 (⩽0.07 dex) does not exceed the relevant sources of uncertainty. As expected from previous studies, the heavy elements show the signature of the r-process. Their abundance ratios are essentially identical to those of M30, another nearby globular cluster of similar metallicity.