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Paper: Dark Lessons from the Sloan Digital Sky Survey
Volume: 379, Cosmic Frontiers
Page: 89
Authors: Nichol, R.
Abstract: The true nature of dark energy remains unclear: It is either a strange fluid in the Universe, with a negative effective pressure, or a breakdown in General Relativity on large scales. This question can only be answered through a suite of different observations as a function of redshift. In this paper, I will briefly review our attempts to achieve this goal using data from the Sloan Digital Sky Survey (SDSS). In particular, I will present new measurements of the Baryon Acoustic Oscillations (BAO) from the SDSS DR5 galaxy redshift survey as well as outline the on–going SDSSII Supernova survey, which has already detected (in 2005–06) over 300 SNe Ia’s over the redshift range 0.05 < z < 0.4. I will also discuss the latest measurements of the Integrated Sachs–Wolfe (ISW) effect that now probe the density of dark energy at z ~ 1.5. All these measurements are still consistent with a Λ-dominated universe.
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