Precision Bothrology: Toward a Physical Theory of Sgr A*

AST-0709246 Gammie这是一个数值模拟Sgr A* 的程序，Sgr A * 是围绕我们银河系中心黑洞的发光等离子体。 这些模型将纳入自洽的广义相对论磁流体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，韧致辐射，以及黑洞自旋的动力学效应。 这些模型将被用来预测成像Sgr A* 的结果，通过甚长基线干涉，光谱，偏振，和变化的Sgr A* 从远红外到伽马射线。 这项工作将导致以后的系统建模，冷却和辐射力比它们在Sgr A* 中更重要。 准确的模型，如这些是必不可少的理解当前和未来的观测数据，并评估在当今研究中使用的近似值。该项目将推进发现和理解，同时促进教学，培训，并通过两名学生的参与，通过本科生的研究经验计划学习。 研究生和本科生与博士后研究人员和主要研究者的混合将使每个参与者受益。 这项研究的结果将通过在网络上公开发布代码和通过公共宣传广泛传播。

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.