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Abstract: Constraints on the expansion history of the universe from measurements ofcosmological distances make predictions for large-scale structure growth. Sincethese predictions depend on assumptions about dark energy evolution and spatialcurvature, they can be used to test general classes of dark energy models bycomparing predictions for those models with direct measurements of the growthhistory. I present predictions from current distance measurements for thegrowth history of dark energy models including a cosmological constant andquintessence. Although a time-dependent dark energy equation of statesignificantly weakens predictions for growth from measured distances, forquintessence there is a generic limit on the growth evolution that could beused to falsify the whole class of quintessence models. Understanding theallowed range of growth for dark energy models in the context of generalrelativity is a crucial step for efforts to distinguish dark energy frommodified gravity.



Author: Michael J. Mortonson CCAPP-Ohio State

Source: https://arxiv.org/







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