# CLUSTER–VOID DEGENERACY BREAKING: DARK ENERGY, PLANCK, AND THE LARGEST CLUSTER AND VOID

@article{Sahlen2016CLUSTERVOIDDB,
title={CLUSTER–VOID DEGENERACY BREAKING: DARK ENERGY, PLANCK, AND THE LARGEST CLUSTER AND VOID},
author={Martin Sahl'en and 'Inigo Zubeld'ia and Joseph I. Silk},
journal={The Astrophysical Journal},
year={2016},
volume={820}
}
• Published 12 November 2015
• Physics
• The Astrophysical Journal
Combining galaxy cluster and void abundances breaks the degeneracy between mean matter density and power-spectrum normalization . For the first time for voids, we constrain and for a flat Λ CDM universe, using extreme-value statistics on the claimed largest cluster and void. The Planck-consistent results detect dark energy with two objects, independently of other dark energy probes. Cluster–void studies are also complementary in scale, density, and nonlinearity, and are of particular interest…
17 Citations

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