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Natural Phantom Dark Energy, Wiggling Hubble Parameter $H(z)$ and Direct $H(z)$ Data | | Hongsheng Zhang
; Zong-Hong Zhu
; | | Date: |
11 Mar 2007 | | Abstract: | Recent 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. | | Source: | arXiv, astro-ph/0703245 | | Services: | Forum | Review | PDF | Favorites | |
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