论文标题
NES Echelle光谱仪执行的Sao Ras的6米望远镜的选定恒星光谱程序的结果
Results of selected stellar spectroscopy programs at the 6-m telescope of SAO RAS performed with the NES echelle spectrograph
论文作者
论文摘要
在过去的二十年中，6米望远镜的梯形光谱仪NES用于执行跨越各种初始质量的远面恒星的高分辨率光谱。这些研究涵盖了在进化的前期和当前阶段，具有较高质量降低率的恒星。所有这些恒星都有强大的大气和结构化的情节信封，这些恒星由强风产生。我们研究了爱丁顿限制附近的发光蓝色变量。光谱中具有B [E]现象的热超级巨人，它们很可能是快速质量交换阶段后不久的中间质量二元系统。一组黄色的超级巨人，以及大量低质量后AGB超级巨人的样本。这些恒星类型的多样性的性质是其共同特征的存在，即构成界限的存在使此类物体的光谱成为全面的任务。 Such studies consist of many etapes, which include not only determining the peculiarities of their atmospheric chemical composition and understanding the role of supergiants in the enrichment of the interstellar medium with freshly synthesized elements, but also the determination of the evolution status of the objects considered, as well as search for and analysis of spectroscopic manifestations of kinematic processes in their extended and unstable atmospheres and gas-dust envelopes.我们通过光谱监测选定的对象，详细研究了所考虑的恒星大气的运动学状态的不稳定性。这篇综述简要报告了1998 - 2021年计划框架内获得的最重要的观察。
Over the past two decades the echelle spectrograph NES of the 6-m telescope was used to perform high resolution spectroscopy of far evolved stars spanning a wide range of initial masses. The studies cover a diversity of stars with high mass-loss rates during the preceding and current stages of evolution. All these stars have extended atmospheres and structured circumstellar envelopes produced by strong stellar winds. We have studied luminous blue variables near the Eddington limit; hot supergiants with B[e] phenomenon in spectra, which are very likely intermediate-mass binary systems soon after the fast mass exchange stage; a group of yellow hypergiants, as well as an extensive sample of low-mass post-AGB supergiants. The diverse nature of the types of these stars whose common feature is the presence of a circumstellar envelope makes the spectroscopy of such objects a comprehensive task. Such studies consist of many etapes, which include not only determining the peculiarities of their atmospheric chemical composition and understanding the role of supergiants in the enrichment of the interstellar medium with freshly synthesized elements, but also the determination of the evolution status of the objects considered, as well as search for and analysis of spectroscopic manifestations of kinematic processes in their extended and unstable atmospheres and gas-dust envelopes. We spectroscopically monitored selected objects to study in detail the instability of the kinematic state of the atmospheres of the stars considered. This review reports briefly the most significant observational obtained within the framework of the programs in 1998--2021.
