用VLT-CUBES研究UV附近的恒星天体物理学
Stellar astrophysics in the near UV with VLT-CUBES
摘要：
除了新的欧洲极大望远镜（ELT）的未来观测外，8- 10米一代望远镜的优化仪器在“地面紫外线”波长（3000-4000 A）仍将具有竞争力。近紫外提供了丰富的独特的信息，铁峰元素，分子和中子捕获元素的核合成。在欧洲南方天文台甚大望远镜（VLT）的近紫外CUBES摄谱仪的发展背景下，我们正在研究光谱分辨率对估计铍和30多种铁峰和重元素化学丰度的能力的影响。根据CUBES A阶段概念设计之前的工作，我们在这里对CUBES（R~ 20，000）和VLT-UVES（R~ 40，000）的名义分辨率下可观察到的元素进行了比较。对于大多数被考虑的线路，信噪比是比分辨率更关键的因素。我们总结的元素与立方体，其中几个（如Be，Ge，Hf），现在的重点是定量模拟的一部分，正在进行的A阶段研究。
英文摘要：
Alongside future observations with the new European Extremely Large Telescope (ELT), optimised instruments on the 8-10m generation of telescopes will still be competitive at 'ground UV' wavelengths (3000-4000 A). The near UV provides a wealth of unique information on the nucleosynthesis of iron-peak elements, molecules, and neutron-capture elements. In the context of development of the near-UV CUBES spectrograph for ESO's Very Large Telescope (VLT), we are investigating the impact of spectral resolution on the ability to estimate chemical abundances for beryllium and more than 30 iron-peak and heavy elements. From work ahead of the Phase A conceptual design of CUBES, here we present a comparison of the elements observable at the notional resolving power of CUBES (R~20,000) to those with VLT-UVES (R~40,000). For most of the considered lines signal-to-noise is a more critical factor than resolution. We summarise the elements accessible with CUBES, several of which (e.g. Be, Ge, Hf) are now the focus of quantitative simulations as part of the ongoing Phase A study.
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