Gravitational wave solutions in string and M-theory AdS Backgrounds
Alok Kumar, Hari K. Kunduri
Abstract
In this paper, we present several gravitational wave solutions in AdS5 X S5 string backgrounds, as well as in AdS7 X S4 and AdS4 X S7 backgrounds in M-theory, generalizing the results of hep-th/0403253 by one of the authors. In each case, we present the general form of such solutions and give explicit examples, preserving certain amount of supersymmetry, by taking limits on known BPS D3 and M2, M5-brane solutions in pp-wave backgrounds. A key feature of our examples is the possibility of a wider variety of wave profiles, than in pure gravity and string/M-theory examples known earlier, coming from the presence of various p-form field strengths appearing in the gravitational wave structure.
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