用低成本埃歇勒摄谱仪进行双星光谱测量--科学调试
Spectroscopic Survey of Eclipsing Binaries with a Low Cost Échelle Spectrograph -- Scientific Commissioning
摘要：
我们目前的科学成果，最近委托埃歇尔摄谱仪上的0.5米的Solaris-1望远镜在南非天文台。BACHES是一种低成本的狭缝式埃歇尔摄谱仪，在5，500埃的分辨率为21，000。所描述的设置是完全远程操作和部分自动化的。定制的硬件组件已被设计为允许光谱和光度观测。设置通过专用软件控制。该系统的吞吐量使我们能够获得光谱与平均SNR为22，在6375毫米的30分钟曝光的$V=10$马格目标。仪器的稳定性主要受环境温度变化的影响。我们获得了一个明亮的（V = 5.9等）光谱双星的径向速度RMS值，与$V = 10.2$等食双星的0.59 km s $^{-1}$和1.34 km s $^{-1}$一样好。径向速度测量已经与可用的光度光变曲线相结合。我们提出了六个食双星系统的模型，并为以前已知的目标，我们比较我们的结果与文献中提供的。已确定的二元组分的质量与3%的误差为一些目标。我们面对我们的结果与基准值的基础上测量的HARPS和UCLES光谱仪4米级望远镜，并找到非常好的协议。所描述的设置是非常有效的，并且非常适合于光谱勘测。我们现在可以光谱表征约300食双星每年高达10.2等，假设典型的天气条件下，在SAAO没有一个单一的观察之旅。
英文摘要：
We present scientific results obtained with a recently commissioned échelle spectrograph on the 0.5-m Solaris-1 telescope in the South African Astronomical Observatory. BACHES is a low-cost slit échelle spectrograph that has a resolution of 21,000 at 5,500 Å. The described setup is fully remotely operated and partly automated. Custom hardware components have been designed to allow both spectroscopic and photometric observations. The setup is controlled via dedicated software. The throughput of the system allows us to obtain spectra with an average SNR of 22 at 6375 Å for a 30-min exposure of a $V=10$ mag target. The stability of the instrument is influenced mainly by the ambient temperature changes. We have obtained radial velocity RMS values for a bright (V = 5.9 mag) spectroscopic binary as good as 0.59 km s$^{-1}$ and 1.34 km s$^{-1}$ for a $V = 10.2$ mag eclipsing binary. Radial velocity measurements have been combined with available photometric light curves. We present models of six eclipsing binary systems, and for previously known targets, we compare our results with those available in the literature. Masses of binary components have been determined with 3% errors for some targets. We confront our results with benchmark values based on measurements from the HARPS and UCLES spectrographs on 4-m class telescopes and find very good agreement. The described setup is very efficient and well suited for a spectroscopic survey. We can now spectroscopically characterize about 300 eclipsing binary stars per year up to 10.2 mag assuming typical weather conditions at SAAO without a single observing trip.
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