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The Antennae Galaxies - a key to galactic evolution

触角星系——星系演化的关键

基本信息

批准号：
42512932
负责人：
Dr. Thorsten Naab
金额：
--
依托单位：
Max-Planck-Institut für Astrophysik (MPA)
依托单位国家：
德国
项目类别：
Priority Programmes
财政年份：
2007
资助国家：
德国
起止时间：
2006-12-31 至 2011-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/42512932?language=en
关键词：
Antennae Galaxies key galactic evolution

项目摘要

The Antennae system is a prototype for a galactic merger and interaction induced activity. Due to its proximity very detailed observations ranging from radio, optical, up to X-ray are available, providing a multi-wavelength access to its morphological and dynamical properties. However, the information contained in the excellent observational data by far exceeds the capabilities of actual numerical models to fully understand the relevant physics. We use the Antennae galaxies to test and extend current theories of stellar- and gas-dynamics, e.g. the physics of star formation and feedback, and their implementation in numerical models. Two distinct, but strongly related tasks are addressed within the DFG funding. First, the initial conditions (orbit, orientation, mass-ratio, dark matter distribution etc.) will be constrained by applying and extending the software package MINGA, a genetic algorithm based search in parameter space. Second, the physics of star formation and feedback will be constrained using high-resolution self-consistent simulations in direct and detailed comparison with observations. Mergers are the driver for galaxy evolution in modern hierarchical theories. The results of this study can be generalised and will be applicable to simulations of other interacting systems and galaxy-sized as well as large-scale cosmological simulations.

天线系统是银河合并和相互作用引起的活动的原型。由于其邻近，可以进行从无线电、光学到 X 射线的非常详细的观察，从而可以通过多波长了解其形态和动力学特性。然而，优秀的观测数据所包含的信息远远超出了实际数值模型充分理解相关物理的能力。我们使用触角星系来测试和扩展当前的恒星和气体动力学理论，例如恒星形成和反馈的物理学及其在数值模型中的实现。 DFG 资助解决了两项不同但密切相关的任务。首先，通过应用和扩展软件包 MINGA（一种基于遗传算法的参数空间搜索）来约束初始条件（轨道、方向、质量比、暗物质分布等）。其次，恒星形成和反馈的物理学将受到高分辨率自洽模拟的限制，与观测结果进行直接和详细的比较。在现代等级理论中，合并是星系演化的驱动力。这项研究的结果可以推广，并将适用于其他相互作用系统的模拟以及星系大小以及大规模的宇宙学模拟。