The galaxy cluster concentration-mass relation in dark energy cosmologies

Understand

We use numerical simulations of different dark energy cosmologies to investigate the concentration-mass (c-M) relation in galaxy clusters.

• In particular, we consider a reference Lambda cold dark matter (LambdaCDM) model, two models with dynamical dark energy, viewed as a quintessence scalar field [using a Ratra and Peebles (RP) and a supergravity (SUGRA) potential form], and two extended quintessence models, one with positive and one with negative coupling (EQp and EQn respectively), where the quintessence scalar field interacts non-minimally with gravity (scalar-tensor theories).
• All the models are normalized in order to match CMB data from Wilkinson Microwave Anisotropy Probe 3 (WMAP3).
• [Abridged] We consider both the complete catalog of clusters and groups and a subsample of relaxed objects.