On the number of instabilities of cosmological solutions in an Einstein-Yang-Mills system

被引:8
作者
Forgács, M [1 ]
Reuillon, S [1 ]
机构
[1] Univ Tours, Lab Math & Phys Theor, CNRS, UMR 6083, F-37200 Tours, France
关键词
D O I
10.1016/j.physletb.2003.06.061
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A detailed numerical stability analysis of the static, spherically symmetric globally regular solutions of the Einstein-Yang-Mills equations with a positive cosmological constant, Lambda, is carried out. It is found that the number of unstable modes in the even parity sector is n for solutions with n = 1, 2 nodes as Lambda varies. The solution with n = 3 nodes exhibits a rather surprising behaviour in that the number of its unstable modes jumps from 3 to I as A crosses (from below) a critical value. In particular the topologically 3-sphere type solution with n = 3 nodes has only a single unstable mode. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:291 / 297
页数:7
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