On the formation of trapezium-like systems

被引:45
作者
Allison, Richard J. [1 ]
Goodwin, Simon P. [1 ]
机构
[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
关键词
stars: formation; stars: kinematics and dynamics; stars: massive; galaxies: star clusters: general; ORION-NEBULA-CLUSTER; YOUNG STELLAR CLUSTERS; STAR-FORMATION; DYNAMICAL EVOLUTION; MASS SEGREGATION; INITIAL CONDITIONS; SCALE STRUCTURE; BROWN DWARFS; C SYSTEM; CLOUD;
D O I
10.1111/j.1365-2966.2011.18849.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate the formation and evolution of high-order massive star multiples similar to the trapezium in the Orion Nebula Cluster. We perform ensembles of N-body simulations of the evolution of N = 1000 Orion-like clusters with initial conditions ranging from cool and clumpy to relatively smooth and relaxed. We find that trapezium-like systems are frequently formed in the first 2 Myr in initially cool and clumpy clusters and can survive for significant amounts of time in such clusters. We also find that these systems are highly dynamical entities, constantly interacting with the surrounding cluster, changing their appearance and membership regularly. The eventual decay of trapezium-like systems can even destroy the host cluster. We argue that the current state of any trapezium-like system is transient and care should be taken when analysing and drawing conclusions from a single snapshot in the life of a highly dynamic object.
引用
收藏
页码:1967 / 1976
页数:10
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