%0 Journal Article
%T On the equation of state of Dark Energy
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%A Polarski, D.
%A Ranquet, A.
%< avec comité de lecture
%@ 0370-2693
%J Physics Letters B
%I Elsevier
%V 627
%P 1-8
%8 2005
%D 2005
%Z astro-ph/0507290
%R 10.1016/j.physletb.2005.09.008
%Z 04.62.+v; 98.80.Cq
%Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles
%X The formalism in order to obtain the Dark Energy equation of state is extended to non-flat universes and we consider the inequalities that must be satisfied by Phantom Dark Energy in this case. We show that due to a non-vanishing spatial curvature satisfying the observational bounds, the uncertainty on the determination of the Dark Energy equation of state parameter $w$, when it is taken constant, can be significant and that it is minimal for some redshift $z_{cr}\sim 3$. We consider the potential of future measurements of the gravitational waves emitted by binaries at high redshifts $z>z_{cr}$ to reduce this uncertainty. Results obtained here should also be relevant for a weakly varying equation of state with $w\approx -1$.
%G English
%L in2p3-00025048
%U https://hal.in2p3.fr/in2p3-00025048
%~ IN2P3
%~ LPTA
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2