A fine analysis of calcium and iron lines in the spectrum of the K0 giant Pollux : accurate fundamental parameters
A fine analysis of calcium and iron lines in the spectrum of the K0 giant Pollux : accurate fundamental parameters
复制标题
K0巨星北河三的光谱中钙线和铁线的精细分析：准确的基本参数
DOI：
10.1093/mnras/250.1.89
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发表时间：
1991
影响因子：
4.8
通讯作者：
Geoffrey Smith
中科院分区：
文献类型：
--
作者：
J. Drake;Geoffrey Smith
在明亮的K 0 III标准星Pollux（β Gem）中观察到了包含钙和铁谱线的黄色和红色光谱区域。对所得到的高质量光谱进行了精细和详细的模式大气分析，得出了以下基本参数。有效温度：T eff = 4865 ± 50 K。表面重力：log g = 2.75 ± 0.15 dex（g单位：cm s −2）。铁丰度的对数（相对于太阳）：[Fe/H] = −0.04 ± 0.05 dex。对数钙丰度（相对于H = 12.00）：Ca/H = 6.25 ± 0.1 dex。微湍流：ε = 1.4 ± 0.1 km s −1。详细的辐射传输和统计平衡计算的结果已被用来解释偏离LTE的钙光谱
Yellow and red spectral regions containing calcium and iron lines have been observed for the bright K0 III standard Pollux (β Gem). A fine and detailed model atmosphere analysis of the resulting spectra, which are of high quality, has yielded the following fundamental parameters. Effective temperature : T eff = 4865 ± 50 K. Surface gravity : log g = 2.75 ± 0.15 dex (g in cm s −2 ). Logarithmic iron abundance (relative to the Sun) : [Fe/H] = −0.04 ± 0.05 dex. Logarithmic calcium abundance (relative to H = 12.00) : Ca/H = 6.25 ± 0.1 dex. Microturbulence : ξ = 1.4 ± 0.1 km s −1 . The results of detailed radiative transfer and statistical equilibrium calculations have been used to account for departures from LTE in the calcium spectrum