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The Dynamical Evolution of Stars and their Circumstellar Environments in Young Dense Clusters

年轻致密星团中恒星及其星周环境的动力学演化

基本信息

批准号：
171164321
负责人：
Dr. Christoph Olczak
金额：
--
依托单位：
Astronomisches Rechen-Institut
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/171164321?language=en
关键词：
Dynamical Evolution Stars their Circumstellar

项目摘要

The aim of this project is to investigate numerically the dynamical evolution of young dense star clusters from their earliest gas-embedded stages, focusing on the effect of gravitational interactions among the stellar population and their protoplanetary discs. The recent finding that most stars form in star clusters makes this project a vital contribution to the understanding of star and planet formation, one of the fundamental issues of current research. The investigation will be carried out via numerical simulations of star cluster models using highorder accurate direct parallel N-body codes and novel supercomputers based on special accelerator devices. It involves the development of three entirely new features as part of a direct N-body code that will provide an unprecedented realism in the numerical study of young star clusters: (i) a realistic treatment of the cluster’s gas potential, (ii) the implementation of star cluster formation, and (iii) the direct integration of a cluster composed of star-disc systems. The numerical simulations will be confronted with observational programs using the currently most advanced observational facilities for star cluster studies (VLT, HST, LBT, Spitzer). This close link of theoretical and observational astrophysics will potentially (i) provide full dynamical models of four young star clusters that are in the focus of current star formation research, (ii) quantify the effect of the star formation process on cluster members and dynamics, and (iii) constrain the survival probability of discs and planets in a cluster environment.

该项目的目的是研究年轻致密星团从其最早的气体嵌入阶段的动态演化，重点研究恒星群及其原行星盘之间的引力相互作用的影响。最近发现，大多数恒星都是在星团中形成的，这使得这个项目对理解恒星和行星的形成做出了重要贡献，这是当前研究的基本问题之一。研究将通过使用高阶精确直接并行n体代码和基于特殊加速器装置的新型超级计算机对星团模型进行数值模拟。它涉及开发三个全新的特征，作为直接n体代码的一部分，这将为年轻星团的数值研究提供前所未有的现实性：(i)对星团气体潜力的现实处理，（ii）星团形成的实施，以及（iii）由星盘系统组成的星团的直接集成。数值模拟将面对使用目前最先进的星团观测设备（VLT， HST， LBT, Spitzer）的观测程序。这种理论和观测天体物理学的紧密联系将有可能(i)提供当前恒星形成研究重点的四个年轻星团的完整动力学模型，（ii）量化恒星形成过程对星团成员和动力学的影响，以及（iii）约束星团环境中盘和行星的生存概率。