Braz. J. Phys. vol.35 número4B

Our purpose in this work is to generalize previous results [1–4] and to study static and charged cosmic strings as par- ticular solutions of a Einstein-Maxwell-Dilaton theory of

To get this result we will use the fact that, in the weak field approximation, solutions of scalar- tensor theories are simply related to the solutions of gen- eral relativity

To investigate the extent to which a possible detection of a nontrival topology may place constraints on the cosmological density parameters, we consider here the globally homoge-

Therefore, according to the this theorem, it is possible, to locally embed G¨odel’s solution in a five-dimensional Ricci-flat pseudo-Riemannian space.. From the standpoint of

Some au- thors argued quite convincingly that the large scale distribu- tion of matter should be fractal, quite the oposite to that ex- pected by the cosmological principle..

It is nevertheless conceptually important to realize that if non-linearities, and hence decoherence, are weak enough so that δ < 1, the distribution of primordial

In the present work we investigate how the mass of the scalar field influences the emission rate and the power emitted by a swirling source ro- tating around a massive object, due to

At the same time the ambiguity concerns only R √ g ¤ R in the anom- aly and the induced dynamics coming from the vacuum effec- tive action can be made completely unambiguous