On the elemental abundance and isotopic mixture of mercury in HgMn stars
On the elemental abundance and isotopic mixture of mercury in HgMn stars
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HgMn星中汞的元素丰度和同位素混合物
DOI：
10.1051/0004-6361:20030213
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发表时间：
2003
影响因子：
6.5
通讯作者：
S. Hubrig
中科院分区：
文献类型：
--
作者：
Linus Dolk;G. Wahlgren;S. Hubrig
本文研究了31颗HgMn星的汞丰度和同位素混合物的光学区域光谱。在研究过程中，研究了Hgλ4358和Hgλλ3984,6149这两条谱线，并在几颗HgMn星中建立了这三条谱线的丰度。从λ-3984谱线的高分辨光谱中确定了汞同位素混合物。通过比较由汞线和汞线得到的丰度，在七颗观测到的汞锰星中发现了可能的电离异常迹象。已检测到汞丰度与Teff值之间可能存在的关联。在HgMn星中发现了锰和汞丰度之间弱反相关的可能迹象，这可以解释为这些元素表面分布不均匀的迹象。在这项研究中，一些汞锰恒星的汞丰度和同位素混合物是第一次被报道。
Optical region spectra of 31 HgMn stars have been studied for the abundance and isotope mixture of mercury. In the course of the investigation the lines Hg λ4358 and Hg λλ3984,6149 have been studied, with abundances established for all three lines in several HgMn stars. The mercury isotope mixture has been determined from high resolution spectra of the λ3984 line. Possible signs of an ionization anomaly have been detected by the comparison of the abundance derived from the Hg line and the Hg lines in seven of the observed HgMn stars. A possible correlation of the mercury abundance with Teff has been detected. Possible signs of a weak anticorrelation of the manganese and mercury abundance in HgMn stars have been found, which could be interpreted as a sign of inhomogeneous surface distribution of these elements. For a number of the HgMn stars in this study the mercury abundance and isotope mixture are reported for the first time.