Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data

Details Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data

2008-04-24

arxiv.org/abs/0804.3829v1

Mon. Not. R. Astron. Soc. 388: 275-281(2008)

Astronomy and Astrophysics

Astrophysics

7 pages, contains 5 figures and 2 tables, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2008.13380.x

In this paper, we revisit the parameterizations of the equation of state of dark energy and point out that comparing merely the $\chi^2$ of different fittings may not be optimal for choosing the "best" parametrization. Another figure of merit for evaluating different parametrizations based on the area of the $w(z) - z$ band is proposed. In light of the analysis of some two-parameter parameterizations and models based on available SNIa data, the area of $w(z)-z$ band seems to be a good figure of merit, especially in the situation that the value of $\chi^2_{\rm min}$ for different parametrizations are very close. Therefore, we argue that both the area of the $w(z)-z$ band and $\chi^2_{\rm min}$ should be synthetically considered for choosing a better parametrization of dark energy in the future experiments.

Affiliated with

Also associated with

No associations

Rating

Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-504410