论文标题
幸运光谱，一种与幸运成像的等效技术：ii。使用William Herschel望远镜的19个近距离二进制文件的空间分辨的中分辨率蓝紫色光谱
Lucky spectroscopy, an equivalent technique to Lucky Imaging: II. Spatially-resolved intermediate-resolution blue-violet spectroscopy of 19 close massive binaries using the William Herschel Telescope
论文作者
论文摘要
语境。许多巨大的恒星都有附近的同伴，他们的存在通过光谱妨碍了他们的特征。目标。我们希望继续获得近距离视觉二进制的空间分辨光谱，以得出其光谱类型。方法。我们已经使用了幸运光谱法获得了许多在良好的观察条件下的19个近距离视觉二进制文件的短路长期光谱暴露。我们选择了具有最佳特征的人，使用多核拟合提取了光谱，并将结果结合在一起以得出空间分离的光谱。将结果与来自幸运成像，常规中分辨率单阶光谱和埃切尔尔高分辨率光谱的数据结合进行分析。结果。幸运光谱的新应用使我们能够与更明亮的BA Supergiant Companions首次[A]在空间上解开两颗O（FN CMA B和6 Cas B）； [b]确定有两个B恒星（Alpha SCO B和HD 164492 B），具有近距离和更大的伴侣是快速旋转器； [c]将技术扩展到具有极大差异，较短的分离和轻率的原发性幅度降低到b = 11的情况。 [d]在空间上，恒星的光谱与同伴一样多样化（6 cas a），WR星（WR 157）和M Supergiant（Alpha sco a）； [e]发现一些目标的意外身份，例如两个先前未知的明亮O恒星（HD 51756 B和BD +60 544）和稀有OC类别的新成员（HD 8768 A）； [f]识别和分类四个视觉二进制的组件中的哪个是双线光谱二进制的，对于另外七个系统，使用高光谱分辨率光谱检测光谱二进制的迹象。我们还确定了该技术的限制。 [简略]
CONTEXT. Many massive stars have nearby companions whose presence hamper their characterization through spectroscopy. AIMS. We want to continue obtaining spatially resolved spectroscopy of close massive visual binaries to derive their spectral types. METHODS. We have used lucky spectroscopy to obtain many short long-slit spectroscopic exposures of 19 close visual binaries under good seeing conditions. We selected those with the best characteristics, extracted the spectra using multiple-profile fitting, and combined the results to derive spatially separated spectra. The results are analyzed in combination with data from lucky imaging, regular intermediate-resolution single-order spectroscopy, and échelle high-resolution spectroscopy. RESULTS. The new application of lucky spectroscopy has allowed us to [a] spatially disentangle for the first time two O stars (FN CMa B and 6 Cas B) with brighter BA supergiant companions; [b] determine that two B stars (alpha Sco B and HD 164492 B) with close and more massive companions are fast rotators; [c] extend the technique to cases with extreme magnitude differences, shorter separations, and fainter primary magnitudes down to B=11; [d] spatially disentangle the spectra of stars with companions as diverse as an A supergiant (6 Cas A), a WR star (WR 157), and an M supergiant (alpha Sco A); [e] discover the unexpected identity of some targets such as two previously unknown bright O stars (HD 51756 B and BD +60 544) and a new member of the rare OC category (HD 8768 A); and [f] identify and classify which of the components of four visual binaries is a double-lined spectroscopic binary and for another seven systems detect signs of spectroscopic binarity using high-spectral-resolution spectroscopy. We also present a determination of the limits of the technique. [ABRIDGED]
