Interpreting the conformal cousin of the Husain-Martinez-Nunez solution
arXiv:1208.3731 · doi:10.1103/PhysRevD.86.084044
Abstract
A 2-parameter inhomogeneous cosmology in Brans-Dicke theory, obtained by conformally transforming the Husain-Martinez-Nunez (HMN) scalar field solution of the Einstein equations is studied and interpreted physically. According to the values of the parameters it describes a wormhole, a naked singularity, or else a spacetime containing apparent black hole horizons which appear/disappear in pairs (as well as a cosmological horizon) as in the original HMN metric. The reasons why there isn't a one-to-one correspondence between conformal copies of this metric are discussed.
7 pages, 2 figures. Removed a subsection which referred to an empty subclass of solutions, added discussion, a special (static) case, and references
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