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Dynamical and static solutions to $R=0$-scalar-tensor theory

We consider the most cosmologically interesting and relevant case of scalar-tensor theory (STT) and derive new normal and phantom, dynamical and static, solutions. We determine the Bianchi I Kasner exponents and show that the dynamical solutions are heteroclinic orbits connecting two singularities. Approaching the singularities, a purely transverse expansion (no radial expansion or collapse) may occur.

preprint2020arXivOpen access
Mustapha Azreg-Aïnou
astro-ph.COmath-phmath.MPgr-qc
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Mustapha Azreg-Aïnou

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