A dilation model
of the universe unveils the nature of dark energyAlfredo G. Oliveira Abstract This work presents a
critical yet previously unnoticed property
of the units of some constants, able of supporting a new, self-similar (dilation), model
of the universe. This model displays a time variation of scale with invariance of
dimensionless parameters, a characteristic of self-similar phenomena displayed
by cosmic data. The model is deducted
from two observational results (expansion of space and invariance of constants)
and has just one parameter, the Hubble parameter. Somewhat surprisingly,
classic physical laws hold both in standard and comoving units, except for a
small new term in the angular momentum law that is beyond present possibilities
of direct measurement. In spite of having just one parameter, the model is as
successful as the LCDM model in the classic cosmic tests, and a value of H_{0} = 64 km s^{-1} Mpc^{-1} is obtained from
the fitting with supernovae Ia data from Union compilation. It is shown that in
standard units the model corresponds to Big Bang cosmologies, namely to the LCDM
model, unveiling what dark energy stands for. This scaling (dilation) model is
a one-parameter model that seems able of fitting cosmic data, that does not
conflict with fundamental physical laws and that is not dependent on
hypotheses, being straightforwardly deducted from the two observational results
above mentioned.Note: in this work, "self-similarity" refers to time dependent phenomena, not to fractals, which are also self-similar but in space, not time. To view or download the article go to: self-similar model |