Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2012-02-10
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
9 pages, 1 figure, to appear in the Proceedings of the 3rd Italian-Pakistani Workshop on Relativistic Astrophysics, Lecce 20-2
Scientific paper
We discuss the thermodynamic and dynamical properties of a variable dark energy model with density scaling as $\rho_x \propto (1+z)^{m}$, z being the redshift. These models lead to the creation/disruption of matter and radiation, which affect the cosmic evolution of both matter and radiation components in the Universe. In particular, we have studied the temperature-redshift relation of radiation, which has been constrained using a recent collection of cosmic microwave background (CMB) temperature measurements up to $z \sim 3$. We find that, within the uncertainties, the model is indistinguishable from a cosmological constant which does not exchange any particles with other components. Future observations, in particular measurements of CMB temperature at large redshift, will allow to give firmer bounds on the effective equation of state parameter $w_{eff}$ for such types of dark energy models.
Jetzer Philippe
Tortora Crescenzo
No associations
LandOfFree
Constraining decaying dark energy density models with the CMB temperature-redshift relation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraining decaying dark energy density models with the CMB temperature-redshift relation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining decaying dark energy density models with the CMB temperature-redshift relation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-275743