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Interior perfect fluid scalar-tensor solution
Stoytcho S. Yazadjiev
We present a new exact perfect fluid interior solution for a particular scalar-tensor theory. The solution is regular everywhere and has a well defined boundary where the fluid pre…
Generating --cosmologies with perfect fluid in dilaton gravity
Stoytcho S. Yazadjiev
We present a method for generating exact diagonal -cosmological solutions in dilaton gravity coupled to a radiation perfect fluid and with a cosmological potential of a specia…
Cold scalar-tensor black holes coupled to a massless scalar field
Stoytcho S. Yazadjiev
New four-dimensional black hole solutions of Brans-Dicke equations with a negative constant , coupled to a massless scalar field, are presented. The temperature of these black h…
Plane-symmetric inhomogeneous Brans-Dicke cosmology with an equation of state
Stoytcho S. Yazadjiev
We present a new exact solution in Brans-Dicke theory. The solution describes inhomogeneous plane-symmetric perfect fluid cosmological model with an equation of state . Some…
Self-similar collapse of a scalar field in dilaton gravity and critical behaviour
Stoytcho S. Yazadjiev
We present new analytical self-similar solutions describing a collapse of a massless scalar field in scalar-tensor theories. The solutions exhibit a type of critical behavior. The…