论文标题
HR 6819三重系统是否包含休眠的黑洞？未必
Does the HR 6819 triple system contain a dormant black hole? Not necessarily
论文作者
论文摘要
Rivinius等人最近的一篇论文。提议HR 6819是一个三重系统，具有远处的恒星和40天轨道的二元系统，由B3 III巨人和休眠的黑洞（BH）组成。我们建议该模型的证据不是结论性的。在另一种模型中，巨人的伴侣本身就是一个短期二进制的二进制文件，例如$ \ sim $$ 4 $ -DAY轨道，例如两颗A0星。两颗A0星中的每一个都应贡献$ \ sim $ 4 \％4 \％$ $ \％$的总亮度在$ v $频段中，并且由于其假定的轨道运动，它们的光谱线正在移动。因此，只有对观察到的光谱进行仔细的分析才能排除这种模型。在提出这样的分析之前，并得出了假设A0恒星吸收线深度的上限，隐藏闭合对的模型比BH模型更有可能。
A recent paper by Rivinius et al. proposed that HR 6819 is a triple system, with a distant Be star and a binary of 40-day orbit, composed of a B3 III giant and a dormant black hole (BH). We suggest that the evidence for this model is not conclusive. In an alternative model, the companion of the giant is by itself a short-period binary in, say, a $\sim$$4$-day orbit, consisting, for example, of two A0 stars. Each of the two A0 stars should contribute $\sim$$4\%$ of the total brightness of the system in the $V$ band, and their spectral lines are moving due to their assumed orbital motion with an unknown period. Therefore, only a careful analysis of the observed spectra can exclude such a model. Before such an analysis is presented and upper limits for the depths of the hypothetical A0 star absorption lines are derived, the model of a hidden close pair is more probable than the BH model.
