The Nature of Singularity in Bianchi I Cosmological String Gravity Model with Second Order Curvature Corrections

Abstract

We investigate Bianchi I cosmological model in the theory of a dilatonM field coupled to gravity through a Gauss-Bonnet term. Two type ofM cosmological singularity are distinguished. The former is analogous toM the Einstein gravity singularity, the latter (which does not appear inM classical General Relativity) occurs when the main determinant of theM system of field equations vanishes. An analogy between the latterM cosmological singularity and the singularity inside a black hole withM a dilatonic hair is discussed. Initial conditions, leading to theseM two types of cosmological singularity are found via numericalM integration of the equation of motion.

5 pages with 6 PostScript figures; small comments and references added; final version to appear in Phys. Lett. B

References in corpus (3)

• Geometry and Destiny
• Generality of Singularity Avoidance in Superstring Theory: Anisotropic Case
• On the structure of some typical singularities for implicit ordinary differential equations

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