Kaigorodov spaces and their Penrose limits

被引:15
作者
Patricot, C [1 ]
机构
[1] Univ Cambridge, DAMTP, Ctr Math Sci, Cambridge CB3 0WA, England
关键词
D O I
10.1088/0264-9381/20/11/310
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Kaigorodov spaces arise, after spherical compactification, as near-horizon limits of M2, M5 and D3-branes with a particular pp-wave propagating in a worldvolume direction. We show that the uncompactified near-horizon configurations K x S are solutions of D = 11 or D = 10 IIB supergravity Which correspond to perturbed versions of their AdS x S analogues. We derive the Penrose-Guven limits of the Kaigorodov space and the total spaces and analyse their symmetries. An Inonu-Wigner contraction of the Lie algebra is shown to occur, although there is a symmetry enhancement. We compare the results to the maximally supersymmetric CW spaces found as limits of AdS x S spacetimes: the initial gravitational perturbation on the brane and its near-horizon geometry remains after taking non-trivial Penrose limits, but seems to decouple. One particular limit yields a time-dependent homogeneous plane-wave background whose string theory is solvable, while in the other cases we find inhomogeneous backgrounds.
引用
收藏
页码:2087 / 2102
页数:16
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