6 papers
Brief History of Black-Holes
Marcelo Samuel Berman
We show that the gravitational collapse of a black-hole terminates in the birth of a white-hole, due to repulsive gravitation (antigravitation); in particular, the infinite energy…
Energy of Kerr-Newman Black-Holes and Gravitomagnetism
Marcelo Samuel Berman
New formulae are obtained for the energy of K.N. b.h.'s that point out a gravitomagnetic energy effect. The results are valid for slowly or rapidly rotating black-holes. The expres…
Amplification of Gravitational Waves During Inflation in Brans-Dicke Theory
Marcelo S. Berman, Luis A. Trevisan
We show that Gravitational Waves are exponetially amplified in the inflationary phase in Brans-Dicke theory, so that it would be possible to detect them and in this way verify seve…
Possible Cosmological Implications of Time Varying Fine Structure Constant
Marcelo S. Berman, Luis A. Trevisan
We make use of Dirac LNH and results for a time varying fine structure constant in order to derive possible laws of variation for speed of light, the number of nucleons in the Univ…
Static Generalized Brans-Dicke Universe and Gravitational Waves Amplification
Marcelo S. Berman, Luis A. Trevisan
We find a static solution for the scale-factor in a Brans-Dicke generalized theory where the scalar field and the coupling constant vary with time. We find also that in the early U…
Estimate on the deceleration parameter in a Universe with variable fine structure constant
Marcelo S. Berman, Luis A. Trevisan
We determine a cosmological model that include a positive acceleration of the Universe and a time decreasing fine structure constant. The present day deceleration parameter is esti…