2006/04/19 by Damien Martin, Martin, Damien, Andreas Albrecht +1 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0604401
3 pages; brief comment
arxiv created 2006/04/19 · arxiv updated 2009/12/01
We consider two different methods of parameterizing the dark energy equation of state in order to assess possible ``figures of merit'' for evaluating dark energy experiments. The two models are w(a) = w0 + (1-a)wa and w(a) = wp + (ap - a)wa. This brief note shows that the size of the error contours cannot change under such a reparameterization. This makes the figures of merit associated with these parameterizations mathematically identical. This also means that any ``bias'' exhibited by one model is equally present in the other.