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.

在黑洞上积聚是从常规物质中提取能量的最有效方法。因此，重力能为宇宙中最发光的物体提供动力。同时，重力的累积性质在确定所有尺度的物质的结构和演变方面具有决定性的作用。在各种宇宙背景下，对这些双胞胎方面的理论理解 - 积聚以及父母系统的结构和演变是我们研究的关键主题。在最小的规模上，包含黑洞的近距离二进制系统为研究积聚过程（例如圆盘形成和稳定性）提供了高度可拖动的途径。但是，重要的是要了解这些二进制文件本身的长期演变以及其他星系的标准和超大型X-射线种群。同样，天文学家想了解超级质量黑洞（SMBH）的积聚如何能力活跃银河核（AGN）。但是他们也希望知道这些对象如何适合星系结构和形成的一般情况。伽马 - 射线爆发（GRB）提供了另一个例子，其中增生过程的研究与理解宿主星系以及其中的恒星和二元进化密切相关。暗物质提供了结构形成和发展的潜在井，因此我们需要了解其物理特性，以便在宇宙中具有完整的结构形成理论。我们从理论上研究了所有这些对象，在过去的十年中，我们的重点已向超级质量/额外的\ - 乳半型系统转移。

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