论文标题
Albireo系统中的另一个明星 - 发现Albireo广告
Yet another star in the Albireo system -- The discovery of Albireo Ad
论文作者
论文摘要
语境。 Albireo是著名的明亮视觉双星。目前尚不清楚组件A和B是否形成重力结合的系统。组件Albireo A本身就是二进制恒星。 Albireo AA，AC系统的轨道参数才被确定。因此，对于当前的研究，Albireo仍然是感兴趣的。目标。我们的目的是为检测Albireo系统中的新成员提供证据。此外，我们旨在确定轨道参数并为Albireo系统找到进一步的结论。方法。我们使用了用tigre望远镜获得的阿尔巴雷奥A的光谱观察结果，并在三年内确定了径向速度。我们用RADVEL分析了径向速度曲线，以确定轨道参数。此外，我们用ISPEC确定了Albireo AA的恒星参数。结果。我们在Albireo系统中发现了另一个明确的证据，绕Albireo AA绕着Albireo AA，大约$ P = 371美元。可以丢弃有关周期性径向速度信号的几种替代解释。新的Companion Albireo广告是一颗低质量明星，约为0.085 〜m_ \ odot $。结论。我们得出的结论是，Albireo是一个分层的多星系，仍然是未来观察和研究的有趣对象。
Context. Albireo is a well-known bright visual double star. It is still unclear if the components A and B form a gravitationally bound system. The component Albireo A is itself a binary star. The orbital parameters of the Albireo Aa, Ac system have been determined only recently. Thus, Albireo is still of interest for current research. Aims. We aim to present evidence for the detection of a new member in the Albireo system. Furthermore, we aim to determine the orbital parameters and to find further conclusions for the Albireo system. Methods. We used spectroscopic observations of Albireo A obtained with the TIGRE telescope and determined the radial velocities during a period of over three years. We analyzed the radial velocity curve with RadVel to determine the orbital parameters. In addition, we determined the stellar parameters of Albireo Aa with iSpec. Results. We found clear evidence for yet another star in the Albireo system orbiting Albireo Aa with a period of about $P = 371$ days. Several alternative explanations for the periodic radial velocity signal could be discarded. The new companion Albireo Ad is a low mass star of about $0.085~M_\odot$. Conclusions. We conclude that Albireo is a hierarchical multiple star system and remains an interesting object for future observations and studies.
