Accretion, Structure and Evolution in Gravitating Systems

引力系统中的吸积、结构和演化

• 批准号: ST/H002235/1
• 负责人: Andrew King
• 金额: $ 187.96万
• 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: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FH002235%2F1
• 关键词: Accretion; Structure; Evolution; Gravitating; Systems

We propose to undertake a broad programme of research in theoretical astrophysics. This research will be centered around accretion, structure and evolution in many astrophysical systems. Accretion is the process whereby a massive, gravitating body accumulates mass from its surroundings. As the mass falls towards the body it can give up energy in the form of heat and light. Accretion onto a black hole is the most efficient way of extracting energy from normal matter. Astrophysical systems powered by accretion are among the luminous in the universe. Gravity not only powers these systems but determines their large-scale structure and long term evolution. The systems we aim to study cover many length scales, from compact binary star systems which would happily fit inside the Sun to colliding galaxies which consist of many billions of Sun-like stars. We will investigate the nature of the non-luminous, dark matter which constitutes about 90 per cent of the mass of our Galaxy, the Milky Way. Our work will also improve our understanding of how the Milky Way was formed and how it has slowly changed over the past 10 billion years.

我们建议在理论天体物理学领域开展广泛的研究计划。这项研究将围绕许多天体物理系统的吸积、结构和演化展开。吸积是一个巨大的引力体从周围环境中积累质量的过程。当质量落向身体时，它会以热和光的形式释放能量。吸积到黑洞上是从正常物质中提取能量的最有效方式。由吸积驱动的天体物理系统是宇宙中发光的系统之一。重力不仅为这些系统提供动力，而且决定了它们的大规模结构和长期演化。我们旨在研究的系统涵盖了许多长度尺度，从适合太阳内部的紧凑双星系统到由数十亿颗类太阳恒星组成的碰撞星系。我们将研究不发光的暗物质的性质，暗物质约占我们银河系质量的 90%。我们的工作还将增进我们对银河系如何形成以及它在过去 100 亿年中如何缓慢变化的理解。

项目成果

A possible formation scenario for dwarf spheroidal galaxies - I. Fiducial model

矮椭球星系可能的形成情景 - I. 基准模型

• DOI: 10.1093/mnras/stt458
• 发表时间: 2013
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Assmann P

Precession of the Sagittarius stream

人马座流的进动

• DOI: 10.1093/mnras/stt1862
• 发表时间: 2013-01
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: M. I. Wilkinson;G. Gilmore;E. W. Olszewski;M. Niederste-Ostholt
• 通讯作者: M. Niederste-Ostholt

Design concepts for the Cherenkov Telescope Array CTA: an advanced facility for ground-based high-energy gamma-ray astronomy

• DOI: 10.1007/s10686-011-9247-0
• 发表时间: 2011-12-01
• 期刊: EXPERIMENTAL ASTRONOMY
• 影响因子: 3
• 作者: Actis, M.;Agnetta, G.;Zychowski, P.
• 通讯作者: Zychowski, P.

Star cluster collisions - a formation scenario for the extended globular cluster Scl-dE1 GC1 Formation scenario for Scl-dE1 GC1

星团碰撞 - 扩展球状星团 Scl-dE1 GC1 的形成情景 Scl-dE1 GC1 的形成情景

• DOI: 10.1111/j.1365-2966.2011.18331.x
• 发表时间: 2011
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Assmann P

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