Constraining the Dark Energy Equation of State with Cosmic Voids
Astrophysics
2011-02-11 v2
Abstract
Our universe is observed to be accelerating due to the dominant dark energy with negative pressure. The dark energy equation of state (w) holds a key to understanding the ultimate fate of the universe. The cosmic voids behave like bubbles in the universe so that their shapes must be quite sensitive to the background cosmology. Assuming a flat universe and using the priors on the matter density parameter (Omega_m) and the dimensionless Hubble parameter (h), we demonstrate analytically that the ellipticity evolution of cosmic voids may be a sensitive probe of the dark energy equation of state. We also discuss the parameter degeneracy between w and Omega_m.
Keywords
Cite
@article{arxiv.0704.0881,
title = {Constraining the Dark Energy Equation of State with Cosmic Voids},
author = {Jounghun Lee and Daeseong Park},
journal= {arXiv preprint arXiv:0704.0881},
year = {2011}
}
Comments
ApJL in press, growth factor corrected, parameter degeneracy calculated