标题： 人马座RS：揭示分量光谱和质量转移 显示英文标题

标题： RS Sagittarii: Revealing the component spectra and the mass transfer

摘要： 我们对短周期大陵型双星RS Sgr的高分辨率（R ~ 48000）光谱和测光数据进行了分析。首次精确得出了系统的光谱和绝对参数。主星被确认为一颗有效温度为19000K的B3主序星，而次级星则被归类为一颗温度为9700K的A0型星。次级星似乎已从主序带演化离开，并正在充满其洛希瓣，通过内拉格朗日点（L1）向更热的主星转移物质。 在光谱中观测到的H{\alpha }发射线和吸收特征归因于低密度的主星周围盘状结构、起源于次级星的气体流以及在主星撞击点形成的热点的组合效应。 光谱和测光数据的联合分析得出系统距离约为418 pc，这与GAIA DR3推导出的值在误差范围内一致。 显示英文摘要

摘要： We present an analysis of high-resolution (R ~ 48000) spectroscopic and photometric data of RS Sgr, a short-period Algol-type binary system. For the first time, precise spectroscopic and absolute parameters of the system have been determined. The primary component is identified as a B3 main-sequence star with an effective temperature of 19000K, while the secondary is classified as an A0-type star with a temperature of 9700 K. The secondary appears to have recently evolved off the main sequence and currently fills its Roche lobe, transferring material through the inner Lagrangian point (L1) to the hotter primary component. The H{\alpha} emission and absorption features observed in the spectra are attributed to a combination of a low-density circumprimary disk, a gas stream originating from the secondary, and a hot spot formed at the impact site on the primary. The combined analysis of spectroscopic and photometric data yields a system distance of approximately 418 pc, which is consistent with the value derived from GAIA DR3 within the uncertainty limits.