论文标题
大规模相互作用的二进制UU Cassiopeiae的光谱法
Spectroscopy of the massive interacting binary UU Cassiopeiae
论文作者
论文摘要
语境。远程封闭的二进制UU CAS是一个相互作用的大型双周期系统，其中益利颗星部分隐藏在积聚磁盘中。目标。为了更详细地研究增生过程的物理学，以及系统中偶色物质的结构和动力学，我们通过分析UU CAS的光谱来补充从光度法获得的先前结果。方法。我们收集了以前关于UU CAS的出版物中使用的所有可用光谱，我们获得了新的光谱。散布的方法应用于跨度2008 - 2021年的一组光谱。轨道参数被解散，并通过合成的分离分量光谱的拟合来确定组件恒星的物理参数。我们将结果与相互作用二进制的演变模型进行了比较。结果。我们发现，除了捐赠者之星的主要作用和赢得益处的弱势贡献之外，线曲线还受到情节性问题的强烈影响。吸收线揭示了轨道平面上方散发出的磁盘。 Hα排放的可变性产生了在几个轨道时期的时间尺度上发生变化的情况的证据。
Context. The eclipsing close binary UU Cas is an interacting massive double-periodic system with a gainer star partly hidden in an accretion disk. Aims. In order to study the physics of the accretion process in greater detail, along with the structure and dynamics of the circumstellar matter in the system, we supplement our previous results obtained from photometry with an analysis of the spectra of UU Cas. Methods. We collected all available spectra used in previous publications on UU Cas and we acquired new ones. The method of disentangling was applied to this set of spectra spanning the years 2008-2021. The orbital parameters were disentangled and a fit of the separated component spectra by synthetic ones has been used to determine the physical parameters of the component stars. We compared the results to models of the evolution of interacting binaries. Results. We found that in addition to the dominant role of the donor star and a weak contribution of the gainer, the line profiles are strongly influenced by the circumstellar matter. The absorption lines reveal a presence of a disk wind emanating above the orbital plane. The variability of Hα emission yields evidence of changes in the structure of the circumstellar matter on a timescale of several orbital periods.
