论文标题
来自ASAS目录的Eclips Binaries的轨道和物理参数-XI。凯龙对长周期二进制的调查
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XI. CHIRON investigation of long-period binaries
论文作者
论文摘要
我们介绍了针对与Chiron光谱仪进行的长轨道时期（p = 20-75 d）的光谱运动的结果。七个系统的物理和轨道溶液源自V波段，I带ASAS，WASP和TESS光度法，而使用二维互相关技术从高质量的光谱中计算了径向速度。恒星的大气参数已从分离的光谱确定。我们的大多数目标是由进化的恒星（亚巨头或红色巨人）组成的，但是两个系统在不同阶段的进化阶段和一个可能的合并中显示了组件。对于四个二进制，成分的质量和半径的精度优于3％。这些对象提供了有关恒星进化的非常有价值的信息。
We present the results of a spectroscopic campaign on eclipsing binaries with long orbital period (P = 20 - 75 d) carried out with the CHIRON spectrograph. Physical and orbital solutions for seven systems were derived from the V-band, and I-band ASAS, WASP, and TESS photometry, while radial velocities were calculated from high quality optical spectra using a two-dimensional cross-correlation technique. The atmospheric parameters of the stars have been determined from the separated spectra. Most of our targets are composed of evolved stars (sub-giants or red giants) but two systems show components in different phases of evolution and one possible merger. For four binaries the masses and radii of the components were obtained with precision better than 3%. These objects provide very valuable information on stellar evolution.
