The Laboratory Astrophysics Programme at Imperial College London

The Laboratory Astrophysics Programme at Imperial College London
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伦敦帝国理工学院实验室天体物理学项目

DOI:
10.1140/epjd/s10053-023-00696-4
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发表时间:
2023
期刊:
The European Physical Journal D
影响因子:
--
通讯作者:
Concepcion F
Concepcion F
中科院分区:
--
文献类型:
--
作者:
Concepcion F

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地面和空间望远镜的进步导致迫切需要和改进对分析天文光谱至关重要的原子数据的广度和准确性。许多数据,即使是铁族等天体物理学上重要的元素,其分析也可以追溯到50多年前,这些数据已不再适合解释现代高分辨率天体物理学光谱。帝国理工学院光谱学小组正在通过测量新的原子数据和使用从红外到真空紫外的傅里叶变换光谱来提高现有数据的准确性来解决这一需求。通过对这些高分辨率光谱的分析,获得了许多天体物理学上重要元素的新的和改进的原子数据。跃迁波长和能级的不确定性的降低通常超过一个数量级,跃迁概率被测量到几个百分比的不确定性。我们的工作提高了可用原子数据的数量和质量。在本文中,我们提供了我们最近的调查和研究计划的更新。我们还详细介绍了我们世界级实验室的改进,以确保我们能够满足天体物理界未来的数据需求。图形摘要
Advancements in ground- and space-based telescopes have resulted in an acute need for and improvement in the breadth and accuracy of the atomic data vital for the analysis of astronomical spectra. Many data, even for astrophysically important elements such as the iron group, have analyses dating back over 50 years, which are no longer suitable for the interpretation of modern, high-resolution astrophysical spectra. The Imperial College Spectroscopy group is addressing this need by measuring new atomic data and improving the accuracy of existing data using Fourier transform spectroscopy from the infrared to the vacuum ultraviolet. Analysis of these high-resolution spectra has led to new and improved atomic data for a wide range of astrophysically important elements. Reductions in uncertainties of transition wavelengths and energy levels are routinely over an order of magnitude and transition probabilities are measured to a few percent of uncertainty. Our work has increased both the quantity and quality of available atomic data. In this paper, we provide an update of our recent investigations and research plans. We also detail the improvements being made to our world-class laboratory to ensure we are able to meet the future data needs of the astrophysical community.Graphical abstract
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