Pablo D. Sisterna

Cosmology, oscillating physics, and oscillating biology.

According to recent reports there is an excess correlation and an apparent regularity in the galaxy one-dimensional polar distribution with a characteristic scale of 128

Charge conservation and time varying speed of light

h^{-1}

Time variation of fundamental constants : bounds from geophysical and astronomical data

Mpc. This aparent spatial periodicity can be naturally explained by a time oscillation of the gravitational constant

Time Variation of Fundamental Constants: Bounds from Local Data

G

Testing a string dilaton model with experimental and observational data

. On the other hand, periodic growth features of bivalve and coral fossiles appear to show a periodic component in the time dependence of the number of days per year. In this letter we show that a time oscillating gravitational constant with similar period and amplitude can explain such a feature.

Energy production in varyingtheories

It has been recently claimed that cosmologies with time dependent speed of light might solve some of the problems of the standard cosmological scenario, as well as in?ationary scenarios. In this letter we show that most of these models, when analyzed in a consistent way, lead to large violations of charge conservation. Thus, they are severly constrained by experiment, including those where c is a power of the scale factor and those whose source term is the trace of the energy-momentum tensor. In addition, early Universe scenarios with a sudden change of c related to baryogenesis are discarded.