Spherical Curvature Inhomogeneities in String Cosmology

Abstract

We study the evolution of non-linear spherically symmetric inhomogeneities in string cosmology. Friedmann solutions of different spatial curvature are matched to produce solutions which describe the evolution of non-linear density and curvature inhomogeneities. The evolution of bound and unbound inhomogeneities are studied. The problem of primordial black hole formation is discussed in the string cosmological context and the pattern of evolution is determined in the pre- and post-big-bang phases of evolution.

19 pages, Latex, 4 figures

References in corpus (2)

• Classical Inhomogeneities in String Cosmology
• Closed Inhomogeneous String Cosmologies

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• Cylindrically Symmetric Inhomogeneous Universes with a Cloud of Strings
• A New Class of Inhomogeneous String Cosmological Models in General Relativity
• Qualitative properties of scalar-tensor theories of Gravity
• Numerical Study of Inhomogeneous Pre-Big-Bang Inflationary Cosmology
• Some Invariant String Cosmological Models in Cylindrically Symmetric Space-time
• Hamilton-Jacobi approach to pre-big bang cosmology and the problem of initial conditions