S-brane Solutions in Supergravity Theories

TL;DR

This work constructs new time-dependent, non-supersymmetric S-brane solutions in supergravity with a dilaton and a $q$-form field, unifying hyperbolic, flat, and spherical transverse geometries within a four-function ansatz. By solving the coupled equations of motion under a gauge choice, the authors obtain an integrable set of first-order equations with explicit $f(t)$ and $g(t)$ solutions, yielding a four-parameter family of S-brane configurations, including a separate treatment for the IIB S3-brane with a self-dual $F_{[5]}$. The static limit connects these time-dependent solutions to known black brane solutions, offering potential interpretations in brane–antibrane dynamics and fluxbrane contexts, and motivating further exploration of their role in dS/CFT and cosmology. Overall, the paper provides a systematic, analytic construction of generalized S-brane solutions in diverse supergravity theories and highlights their possible physical significance beyond supersymmetric settings.

Abstract

In this paper time dependent solutions of supergravities with dilaton and arbitrary rank antisymmetric tensor field are found. Although the solutions are nonsupersymmetric the equations of motions can be integrated in a simple form. Such supergravity solutions are related to Euclidean or spacelike branes (S-branes).