Precision Bothrology: Toward a Physical Theory of Sgr A*

精密机械学：迈向 Sgr A* 的物理理论

• 批准号: 0709246
• 负责人: Charles Gammie
• 金额: $ 72.57万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-15 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0709246&HistoricalAwards=false
• 关键词: Precision; Bothrology; Toward; Physical; Theory

AST-0709246GammieThis is a program of numerical modeling of Sgr A*, the luminous plasma surrounding the black hole at the center of our Galaxy. These models will incorporate self-consistent general relativistic magnetohydrodynamics and general relativistic radiative transfer, including synchrotron emission and absorption by thermal and non-thermal electrons, Compton scattering, bremsstrahlung, and the dynamical effects of the black hole spin. These models will be used to predict the results of imaging Sgr A* by Very Long Baseline Interferometry, and the spectrum, polarization, and variability of Sgr A* from far infrared to gamma-rays. This work will lead to later modeling of systems where cooling and radiation forces are more important than they are in Sgr A*. Accurate models such as these are essential for understanding current and future observational data, and for evaluating the approximations used in present-day studies.The project will advance discovery and understanding while promoting teaching, training, and learning through the involvement of two students, through the Research Experiences for Undergraduates program. The mixture of graduate and undergraduate students with postdoctoral researchers and the Principal Investigator will benefit everyone involved. Results of this research will be broadly disseminated through public release of code on the web and through public outreach.

这是一个Sgr a *的数值模拟程序，Sgr a *是环绕在我们银河系中心黑洞周围的发光等离子体。这些模型将纳入自一致的广义相对论磁流体动力学和广义相对论辐射传递，包括同步辐射发射和热电子和非热电子的吸收、康普顿散射、轫致辐射和黑洞自旋的动力学效应。这些模型将用于预测Sgr A*通过甚长基线干涉测量成像的结果，以及Sgr A*从远红外到伽马射线的光谱、偏振和变异性。这项工作将导致后来的系统建模，其中冷却和辐射力比在Sgr A*中更重要。诸如此类的精确模型对于理解当前和未来的观测数据以及评估当前研究中使用的近似值至关重要。该项目将促进发现和理解，同时通过两名学生的参与，通过本科生研究经验项目促进教学、培训和学习。研究生和本科生与博士后研究人员和首席研究员的混合将使每个人受益。这项研究的结果将通过在网上公开发布代码和通过公共宣传广泛传播。