最冷的RCrB型碳星DY的光谱能量分布分析
Analysis of the spectral energy distribution of the coolest RCrB type carbon star DY Per
摘要：
利用光谱合成技术分析了演化碳巨星DY Per的光谱能量分布。这颗红巨星具有R CrB型恒星的光度特征。我们推导出大气参数的DY每使用三种变体的分子线列表。我们估计Teff在2900 < Teff < 3300 K的范围内。我们采用log g = 0。这颗恒星可能缺乏金属和氢。恒星中最大可能的碳丰度[C]=0.94，提供了以下大气参数：Tef=3100 K，[Fe/H] = 0，log（C/O）=0.6，[N/Fe] = 0，[H/He] = 0，以及Jorgensen的分子C2和CN的谱线列表。
英文摘要：
We analyse the spectral energy distribution of the evolved carbon giant DY Per with a spectral synthesis technique. The red giant shows the photometric features of R CrB type stars. We derive the atmospheric parameters of DY Per using three variants of molecular line lists. We estimate Teff to be in the range 2900 < Teff < 3300 K. We adopted log g = 0. The star may be metal deficient and hydrogen deficient. The maximum possible carbon abundance in the star, [C]=0.94, provides the following atmospheric parameters: Tef=3100 K, [Fe/H] = 0, log(C/O)=0.6, [N/Fe] = 0, [H/He] = 0, with Jorgensen's line lists for the molecules C2 and CN.
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