Beyond Two Dark Energy Parameters
Abstract
Our ignorance of the dark energy is generally described by a two-parameter equation of state. In these approaches a particular {\it ad hoc} functional form is assumed, and only two independent parameters are incorporated. We propose a model-independent, multi-parameter approach to fitting the dark energy, and show that next-generation surveys will constrain the equation of state in three or more independent redshift bins to better than 10%. Future knowledge of the dark energy will surpass two numbers (e.g., [,] or [,]), and we propose a more flexible approach to the analysis of present and future data.
Keywords
Cite
@article{arxiv.0709.1150,
title = {Beyond Two Dark Energy Parameters},
author = {Devdeep Sarkar and Scott Sullivan and Shahab Joudaki and Alexandre Amblard and Daniel E. Holz and Asantha Cooray},
journal= {arXiv preprint arXiv:0709.1150},
year = {2009}
}
Comments
4 pages, 1 figure; Discussion expanded to include next-generation BAO surveys and possible systematics in SN surveys; reflects version accepted for publication in Phys. Rev. Lett