Talk abstract details

We develop a simple method of dark energy reconstruction using a geometrical form of the luminosity-distance relation. In this method for probing dark energy the FRW dynamical system with dark energy is reconstructed instead of the equation of state parameter (Szydlowski and Czaja, Phys.Rev. D69,0235069(2004)). We give several examples which illustrate the usefulness of our method in fitting the redshift transition from the decelerating to accelerating phase as well as its velocity informing us how fast this phenomenon occurs.

We argue that method of $V$-reconstruction is useful in the reconstruction of dynamical dark energy and should be treated as an alternative way to standard reconstruction approach through $w(z)$ in which information is smeared out because of the presence of a double integral in the relation between $w$ and energy density $\rho(z)$. We demonstrate also how the equation of state parameter can be extracted directly from the potential of the FRW dark energy dynamical system.