论文标题
模拟观察值
Simulated observations of heavy elements with CUBES
论文作者
论文摘要
我们研究了来自近紫外光谱的选定中子捕获元件（GE，BI，HF，U）的可行性，该远程仪器现在正在开发非常大的望远镜。我们使用端到端模拟器的端到端模拟器来合成GE I3039Å和HF II 3400和3719Å线的观测值，并使用良好的恒星CS 31082-001用作模板。从模拟的4小时暴露中，我们将估计的丰度恢复到$ \ pm $ \ $ $ \ sim $ \ sim $ 14.25 mag。，以及hf for U = 18 mag。这些表演巧妙地突出了立方体的强大增益，即比现有的CS 31082-001（U = 12.5 mag。）的现有观察结果近三到三个目标。我们还研究了弱的BI I3025Å和U II3860Å线（分别为U $ \ sim $ 14.25和16mag。），发现模拟的4hr暴露应为这些观察到的具有挑战性的线条提供上限。
We investigate the feasibility of robust abundances for selected neutron-capture elements (Ge, Bi, Hf, U) from near-UV spectroscopy with the CUBES instrument now in development for the Very Large Telescope. We use the CUBES end-to-end simulator to synthesise observations of the Ge I 3039 Å and Hf II 3400 and 3719 Å lines in a very metal-poor star, using the well-studied star CS 31082-001 as a template. From simulated 4 hr exposures, we recover estimated abundances to $\pm$0.1 dex for Ge for U $\sim$ 14.25 mag., and for Hf for U = 18 mag. These performances neatly highlight the powerful gain of CUBES for near-UV observations of targets that are two-to-three magnitudes fainter than the existing observations of CS 31082-001 (U = 12.5 mag.). We also investigate the weak Bi I 3025 Å and U II 3860 Å lines (for U $\sim$ 14.25 and 16mag., respectively), finding that simulated 4hr exposures should provide upper limits to these observationally challenging lines.
