Beyond two dark energy parameters |
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Authors: | Sarkar Devdeep Sullivan Scott Joudaki Shahab Amblard Alexandre Holz Daniel E Cooray Asantha |
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Institution: | Department of Physics and Astronomy, University of California, Irvine, California 92697, USA. |
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Abstract: | Our ignorance of dark energy is generally described by a two-parameter equation of state. In these approaches, a particular ad hoc functional form is assumed, and only two independent parameters are incorporated. We propose a model-independent, multiparameter approach to fitting 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 dark energy will surpass two numbers (e.g., w{0},w{1}] or w{0},w{a}]), and we propose a more flexible approach to the analysis of present and future data. |
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