论文标题
光谱二进制7 vul的新研究是恒星主要的
A new study of the spectroscopic binary 7 Vul with a Be star primary
论文作者
论文摘要
我们确认了Be Star 7〜 vul的二进制性质，该二进制于（69.4212 +/- 0.0034）d的轨道轨道更准确，并提高了对系统基本物理元素的了解。分析可用的光度法和\ hA发射的强度，我们还记录了主要的be主要光谱变化。此外，我们确认了〜BETION 0.5592 d的快速光变化，这与原发性的预期旋转周期相当，但请注意，其振幅和可能的周期可能随时间而变化。我们只能将其删除he i 6678次要线，这可以支持我们的初步结论，即次级似乎是热门的subdwarf。在高分散的Far-UV光谱中搜索此对象可以提供确认。二进制组件的可能质量为（$ 6 \ pm1 $）〜mnom \和（$ 0.6 \ pm0.1 $）〜mnom。如果牢固地确认了Hot Subdwarf的存在，则可能将7个VUL确定为具有B4-B5主要的稀有物体。到目前为止，全部BE + Hot SubDwarf系统包含B0-B3原始。
We confirmed the binary nature of the Be star 7~Vul, derived a~more accurate spectroscopic orbit with an orbital period of (69.4212+/-0.0034) d, and improved the knowledge of the basic physical elements of the system. Analyzing available photometry and the strength of the \ha emission, we also document the long-term spectral variations of the Be primary. In addition, we confirmed rapid light changes with a~period of 0.5592 d, which is comparable to the expected rotational period of the Be primary, but note that its amplitude and possibly its period vary with time. We were able to disentangle only the He I 6678 A line of the secondary, which could support our tentative conclusion that the secondary appears to be a hot subdwarf. A search for this object in high-dispersion far-UV spectra could provide confirmation. Probable masses of the binary components are ($6\pm1$)~Mnom \ and ($0.6\pm0.1$)~Mnom. If the presence of a hot subdwarf is firmly confirmed, 7 Vul might be identified as a rare object with a B4-B5 primary; all Be + hot subdwarf systems found so far contain B0-B3 primaries.
