利用IUE档案数据对活跃相互作用双星R Arae的紫外研究
Ultraviolet Study of the Active Interacting Binary Star R Arae using Archival IUE Data
摘要：
食和强相互作用的双星系统Arae R（HD 149730）正处于非常活跃和非常短暂的演化阶段。R Ara由一个B9V初级和一个未知次级组成。我们已经收集了国际紫外线探测器（IUE）的档案数据的R Ara，与第一次研究的数据。在1980、1982、1985、1989和1991年拍摄了117个高分辨率IUE光谱。我们提供了质量转移的光度和光谱证据，并提出了吸积结构的几何形状。我们使用色标径向速度图来观察混合吸收特征的复杂行为，并区分系统内较热和较冷区域的运动。我们在2008年观测到了一次主食，并证实了它的周期正在增加。提出了系统的模型及其演化状态。
英文摘要：
The eclipsing and strongly interacting binary star system R Arae (HD149730) is in a very active and very short-lived stage of its evolution. R Ara consists of a B9V primary and an unknown secondary. We have collected the International Ultraviolet Explorer (IUE) archival data on R Ara, with most of the data being studied for the first time. There are 117 high resolution IUE spectra taken in 1980, 1982, 1985, 1989, and 1991. We provide photometric and spectroscopic evidence for mass transfer and propose a geometry for the accretion structure. We use colour scale radial velocity plots to view the complicated behavior of the blended absorption features and to distinguish the motions of hotter and cooler regions within the system. We observed a primary eclipse of R Ara in 2008 and have verified that its period is increasing. A model of the system and its evolutionary status is presented.
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