Dark Energy Phenomenology
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We discuss the phenomenology of the dark energy in first order perturbation theory, demonstrating that the dark energy cannot be fully constrained unless the dark matter is found, and that there are two functions that characterise the observational properties of the dark sector for cosmological probes. We argue that measuring these two functions should be an important goal for observational cosmology in the next decades.
4 pages, 2 figures, uses moriond.sty. To be published in the Proceedings of the XLIII Rencontres de Moriond 'Cosmology 2008'
4 pages, 2 figures, uses moriond.sty. To be published in the Proceedings of the XLIII Rencontres de Moriond 'Cosmology 2008'