On the Stability of Jordan-Brans-Dicke Static Universe

Understand

In this work we study the stability of the Jordan-Brans-Dicke (JBD) static universe.

• This is motivated by the possibility that the universe might have started out in an asymptotically JBD static state, in the context of the so called emergent universe scenario.
• We extent our previous results on stability of JBD static universe by considering spatially homogeneous Bianchi type IX anisotropic perturbation modes and by including more general perfect fluids.
• Contrary to general relativity, we have found that the JBD static universe, dominated by a standard perfect fluid, could be stable against isotropic and anisotropic perturbations.