论文标题
在苔丝太空任务的连续观看区域中明亮恒星的化学成分
Chemical Composition of Bright Stars in the Continuous Viewing Zone of the TESS Space Mission
论文作者
论文摘要
精确的大气参数和恒星的化学成分在表征超球门系统的物理参数及其形成的理解中起着至关重要的作用。如果已知其主要的大气参数，也可以对恒星进行完整的恒星表征。 NASA过境系外行星调查卫星（TESS）太空望远镜将在搜索明亮恒星周围的系外行星和恒星星星震荡性变异性研究中发挥非常重要的作用。我们已经观察到所有302个明亮（V <8 mag）和比F5光谱级恒星在北部苔丝连续观看区中的静态恒星，并在维尔纽斯大学的Moletai天文学和高分辨率维尔纽斯大学Echelle University Echelle Spectroghph仪的Moletai天文学上有1.65 m的望远镜。我们统一确定了主要的大气参数，年龄，轨道参数，速度成分以及24种化学物种（C（C2），N（CN），[O I]，Na I，Na I，Mg I，Mg I，Al I，al I，Si I，Si I，Si II，Ca I，Ca I，Ca I，Ca I，SC I，SC I，SC I，SC I，fe II，Ti I I II，Ti I，Cr I，Cr i，cr i，cr i，cr i，cr i，c i，cr i，cr i，ca i，ni i，cu i和Zn i）在田间慢慢旋转单星。大约83％的样品恒星表现出大于1.0的Mg/Si比率，并且可能在其系统中携带岩石行星。
Accurate atmospheric parameters and chemical composition of stars play a vital role in characterizing physical parameters of exoplanetary systems and understanding of their formation. A full asteroseismic characterization of a star is also possible if its main atmospheric parameters are known. The NASA Transiting Exoplanet Survey Satellite (TESS) space telescope will play a very important role in searching of exoplanets around bright stars and stellar asteroseismic variability research. We have observed all 302 bright (V < 8 mag) and cooler than F5 spectral class stars in the northern TESS continuous viewing zone with a 1.65 m telescope at the Moletai Astronomical Observatory of Vilnius University and the high-resolution Vilnius University Echelle Spectrograph. We uniformly determined the main atmospheric parameters, ages, orbital parameters, velocity components, and precise abundances of 24 chemical species ( C(C2), N(CN), [O I], Na I, Mg I, Al I, Si I, Si II, Ca I, Ca II, Sc I, Sc II, Ti I, Ti II, V I, Cr I, Cr II, Mn I, Fe I, Fe II, Co I, Ni I, Cu I, and Zn I) for 277 slowly rotating single stars in the field. About 83 % of the sample stars exhibit the Mg/Si ratios greater than 1.0 and may potentially harbor rocky planets in their systems.
