sdOB星EC11481-2303中的金属异常现象：进展报告
Metal-Abundance Peculiarities in the sdOB Star EC11481-2303: A Progress Report
摘要：
对极端水平分支（EHB）恒星的光谱分析表明，超太阳重金属丰度的趋势是随着有效温度的增加而增加。sdOB EC 11481 -2303就是这样一颗恒星，位于EHB的极热端。与其他sdOB恒星相比，它表现出非常平坦的紫外线连续谱。这可能是极端金属线覆盖的结果。我们提出的光谱分析的初步结果，通过静态以及分层NLTE模型大气。
英文摘要：
Spectral analyses of extreme horizontal branch (EHB) stars indicate a trend to supersolar heavy-metal abundances that is increasing with effective temperature. The sdOB EC11481-2303 is such a star, located at the very hot end of the EHB. In contrast to other sdOB stars, it is exhibiting an extraordinary flat UV continuum. This may be the result of extreme metal-line blanketing. We present preliminary results of a spectral analysis by means of static as well as stratified NLTE model atmospheres.
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