论文标题
对Kappa DRA的时间变异性和线轮廓变化的研究
A Study of the Time Variability and Line Profile Variations of kappa Dra
论文作者
论文摘要
在这项研究中，我们介绍了Bright Be star kappa dra的光谱分析。通过直接测量和使用线曲线分离技术获得了两组独立的径向速度速度（RV）测量。使用Fotel and Korel所发现的解决方案的结合，我们重新审视了Kappa DRA的二元性质，并衍生出改进的轨道元素。从Balmer线的RV以及一些强大的金属线中，我们发现所有RVS变化均与轨道时期相锁定。对于H_ALPHA，H_BETA，H_GAMMA和其他一些光谱线，获得了V/R变化，发现它们是用轨道运动进行了锁定的。检测到在H_ALPHA和H_BETA发射线轮廓上叠加的移动吸收凸起。假设圆形轨道为61.5549天，k = 6.81 km/s，则衍生出Kappa DRA的轨道溶液。讨论了线曲线变异性的问题。我们试图寻找未解决的次要组件的吸收或发射线，我们未能找到它们。
In this study, we present a spectroscopic analysis of the bright Be star kappa Dra. Two independent sets of radial velocity velocities (RV) measurements were obtained by direct measurement and using a line profile disentangling technique. Using a combination of the solutions found by the codes FOTEL and KOREL, we revisited the binary nature of kappa Dra and derived improved orbital elements. From the RVs of the Balmer lines and also from some strong metallic lines we found that all RVs variations are phase-locked with the orbital period. V/R variations were obtained for H_alpha, H_beta, H_gamma and some other photospheric lines and they are found to be phase-locked with the orbital motion. A moving absorption bump superimposed over the H_alpha and H_beta emission line profiles was detected. The orbital solutions for kappa Dra were derived assuming a circular orbit with a period 61.5549 day and K = 6.81 km/s . The question of the line profile variability was discussed. We attempted to search for absorption or emission lines of the unresolved secondary component, we failed to find them.
