HPC Resources for Theoretical Astrophysics at the University of Leicester

莱斯特大学理论天体物理学 HPC 资源

• 批准号: ST/H00856X/1
• 负责人: Andrew King
• 金额: $ 38.82万
• 依托单位: University of Leicester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FH00856X%2F1
• 关键词: HPC; Resources; Theoretical; Astrophysics; University

Accretion on to a black hole is the most efficient way of extracting energy from conventional matter. Gravitational energy thus powers the most luminous objects in the Universe. At the same time, gravity's cumulative nature gives it a decisive role in determining the structure and evolution of matter at all scales. The theoretical understanding of these twin aspects -- accretion, and the structure and evolution of the parent systems -- are the key theme of our research, in various cosmic contexts. On the smallest scale, close binary systems containing black holes offer a highly tractable route to studying accretion processes such as disc formation and stability. But it is important also to understand the long--term evolution of these binaries themselves, and the standard and ultraluminous X--ray populations of other galaxies. Similarly, astronomers want to understand how accretion on to supermassive black holes (SMBH) powers active galactic nuclei (AGN). But they also wish to know how these objects fit into the general picture of galaxy structure and formation. Gamma--ray bursts (GRBs) offer another example where the study of accretion processes is closely linked to understanding the host galaxy, and stellar and binary evolution within it. Dark matter provides the potential wells within which structures form and evolve and we therefore need to understand its physical properties in order to have a complete theory of structure formation in the Universe. We study all of these objects theoretically, and our emphasis has shifted strongly towards supermassive/extra\-galactic systems over the last decade.

黑洞的吸积是从常规物质中提取能量的最有效方法。因此，引力能为宇宙中最发光的物体提供动力。与此同时，引力的累积性质使其在确定所有尺度的物质结构和演化方面发挥着决定性作用。对这两个方面（吸积、母系统的结构和演化）的理论理解是我们在各种宇宙背景下研究的关键主题。在最小的尺度上，包含黑洞的封闭双星系统为研究吸积过程（例如盘的形成和稳定性）提供了一条非常容易处理的途径。但了解这些双星本身的长期演化以及其他星系的标准和超光度 X 射线群也很重要。同样，天文学家希望了解超大质量黑洞 (SMBH) 的吸积如何为活动星系核 (AGN) 提供动力。但他们也希望知道这些物体如何融入星系结构和形成的总体图景。伽马射线暴（GRB）提供了另一个例子，其中吸积过程的研究与了解宿主星系以及其中的恒星和双星演化密切相关。暗物质提供了结构形成和演化的势阱，因此我们需要了解其物理特性，以便拥有宇宙中结构形成的完整理论。我们从理论上研究所有这些物体，并且在过去十年中我们的重点已强烈转向超大质量/银河系外系统。

项目成果

Galactic Centre star formation: the case of the missing gas disc The missing gas disc at the Galactic Centre

银河中心恒星形成：失踪气盘案例 银河中心失踪气盘

• DOI: 10.1111/j.1365-2966.2011.19849.x
• 发表时间: 2012
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Alexander R

A possible formation scenario for dwarf spheroidal galaxies - II. A parameter study

矮椭球星系可能的形成情景 - II。

• DOI: 10.1093/mnras/stt1448
• 发表时间: 2013
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Assmann P

Disc instability in RS Ophiuchi: a path to Type Ia supernovae RS Oph and Type Ia SNe

RS Ophiuchi 中的盘不稳定性：通向 Ia 型超新星 RS Oph 和 Ia SNe 的路径

• DOI: 10.1111/j.1365-2966.2011.19647.x
• 发表时间: 2011
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Alexander R

An abundance study of red-giant-branch stars in the Hercules dwarf spheroidal galaxy

武仙座矮椭球星系中红巨星分支恒星的丰度研究

• DOI: 10.1051/0004-6361/201014963
• 发表时间: 2010
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Adén D

THE DISPERSAL OF PROTOPLANETARY DISKS AROUND BINARY STARS

• DOI: 10.1088/2041-8205/757/2/l29
• 发表时间: 2012-10-01
• 期刊: ASTROPHYSICAL JOURNAL LETTERS
• 影响因子: 7.9
• 作者: Alexander, Richard