Astrophysics at the University of Nottingham 2020-2023

诺丁汉大学 天体物理学 2020-2023

• 批准号: ST/T000171/1
• 负责人: Meghan Gray
• 金额: $ 188.1万
• 依托单位: University of Nottingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FT000171%2F1
• 关键词: Astrophysics; University; Nottingham; 2020; 2023

The main focus of our research in Nottingham is to understand how galaxies form and how they evolve through time to produce the rich variety of structures we see today. We tackle these problems with a number of complementary approaches. One approach is to study relatively nearby galaxies, which we can observe in greater detail. In Nottingham we are involved in a large international project (MaNGA), designed to dissect thousands of local galaxies and extract far more information than was previously possible. At the other extreme, we also specialise in studying very distant galaxies, observing them in the act of formation and transformation many billions of years ago. Due to the finite speed of light, when we observe very distant galaxies we are also looking far back in time, allowing us to observe galaxy evolution at different stages throughout the history of the Universe. Another aim of our research is to understand the roles of "nature" versus "nurture" in shaping galaxy evolution, and in particular how they are influenced by the environments in which they reside. We tackle these varied and challenging problems using a combination of observational techniques, using some of the largest telescopes in the world and in space, combined with theoretical studies and computer simulations. With the latest supercomputers we can create models to simulate the formation of galaxies and the growth of cosmic structures. Many of the most interesting discoveries occur when we confront our models with the latest data, to directly test our understanding of the key processes shaping the Universe. We also use gravitational lensing, a novel technique that exploits the warping of space time by massive objects, which allows us to map the distribution of matter and structure in the Universe to great precision. Finally, we are also developing new "machine learning" tools to help the astronomical community analyse the vast amounts of data that are now routinely produced by astronomical observations and simulations.

我们在诺丁汉的主要研究重点是了解星系是如何形成的，以及它们是如何随着时间的推移而进化，从而产生我们今天看到的丰富多样的结构。我们用一些互补的方法来解决这些问题。一种方法是研究相对较近的星系，我们可以更详细地观察它们。在诺丁汉，我们参与了一个大型的国际项目（MaNGA），旨在解剖数千个本地星系，并提取比以前可能的更多的信息。在另一个极端，我们也专门研究非常遥远的星系，观察它们在数十亿年前的形成和转变。由于光速有限，当我们观察非常遥远的星系时，我们也在回顾过去，这使我们能够观察宇宙历史上不同阶段的星系演化。我们研究的另一个目的是了解“自然”与“培育”在塑造星系演化中的作用，特别是它们是如何受到它们所处环境的影响的。我们利用各种观测技术，利用世界上最大的望远镜和太空望远镜，结合理论研究和计算机模拟，来解决这些多样化和具有挑战性的问题。有了最新的超级计算机，我们可以创建模型来模拟星系的形成和宇宙结构的增长。许多最有趣的发现都是在我们用最新的数据来测试我们对宇宙形成关键过程的理解时发生的。我们还使用了引力透镜，这是一种利用大质量物体扭曲时空的新技术，它使我们能够非常精确地绘制出宇宙中物质和结构的分布。最后，我们还在开发新的“机器学习”工具，以帮助天文学界分析现在由天文观测和模拟常规产生的大量数据。

项目成果

The 16th Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra

• DOI: 10.3847/1538-4365/ab929e
• 发表时间: 2020
• 作者: Romina Ahumada;C. Prieto;Andr'es Almeida;F. Anders;S. Anderson;B. Andrews;B. Anguiano;R. Arcodia-R.

The galaxy mass-size relation in CARLA clusters and proto-clusters at 1.4 < z < 2.8: Larger cluster galaxy sizes

1.4 < z < 2.8 时 CARLA 星团和原星团中的星系质量-大小关系：较大的星团星系大小

• DOI: 10.1051/0004-6361/202244634
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Afanasiev A

Close-up view of a luminous star-forming galaxy at z = 2.95

• DOI: 10.1051/0004-6361/202039743
• 发表时间: 2020-12
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: S. Berta;A. Young;P. Cox;R. Neri;B. M. Jones;A. Baker;A. Omont;L. Dunne;A. Rosell;L. Marchetti;M. Negrello;C. Yang;D. Riechers;H. Dannerbauer;I. Pérez-Fournon;P. Werf;T. Bakx;R. Ivison;A. Beelen;V. Buat;A. Cooray;I. Cortzen;S. Dye;S. Eales;R. Gavazzi;A. Harris;C. Herrera;D. Hughes;S. Jin;M. Krips;G. Lagache;M. Lehnert;H. Messias;S. Serjeant;F. Stanley;S. Urquhart;C. Vlahakis;A. Weiss

Limits on non-canonical heating and turbulence in the intergalactic medium from the low redshift Lyman a forest

低红移莱曼森林对星际介质中非规范加热和湍流的限制

• DOI: 10.17863/cam.104216
• 发表时间: 2022
• 作者: Bolton J

The mean free path of ionizing photons at 5 < z < 6: evidence for rapid evolution near reionization

• DOI: 10.1093/mnras/stab2696
• 发表时间: 2021-03
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: G. Becker;Anson D’Aloisio;H. Christenson;Yong Zhu;G. Worseck;J. Bolton