Natural Phantom Dark Energy, Wiggling Hubble Parameter $H(z)$ and Direct $H(z)$ Data

Simple item page
dc.creatorZhang, Hongsheng
dc.creatorZhu, Zong-Hong
dc.date2007-03-11
dc.date2008-05-13
dc.date.accessioned2026-07-07T11:21:18Z
dc.date.available2026-07-07T11:21:18Z
dc.descriptionRecent direct $H(z)$ data indicate that the parameter $H(z)$ may wiggle with respect to $z$. On the other hand the luminosity distance data of supernovae flatten the wiggles of $H(z)$ because of integration effect. It is expected that the fitting results can be very different in a model permitting a wiggling $H(z)$ because the data of supernovae is highly degenerated to such a model. As an example the natural phantom dark energy is investigated in this paper. The dynamical property of this model is studied. The model is fitted by the direct $H(z)$ data set and the SNLS data set, respectively. And the results are quite different, as expected. The quantum stability of this model is also shortly discussed. We find it is a viable model if we treat it as an effective theory truncated by an upperbound.
dc.description14 pages, 2 figures, discussions on the stability added, conclusions not changed
dc.identifierhttps://arxiv.org/abs/astro-ph/0703245
dc.identifierhttp://arxiv.org/abs/astro-ph/0703245
dc.identifierJCAP0803:007,2008
dc.identifierdoi:10.1088/1475-7516/2008/03/007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194225
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleNatural Phantom Dark Energy, Wiggling Hubble Parameter $H(z)$ and Direct $H(z)$ Data
dc.typetext

Files

Collections

arXiv