Bibcode
Cui, W.; Power, Chris; Knebe, Alexander; Kay, Scott T.; Sembolini, Federico; Elahi, Pascal J.; Yepes, Gustavo; Pearce, Frazer; Cunnama, Daniel; Beck, Alexander M.; Dalla Vecchia, C.; Davé, Romeel; February, Sean; Huang, Shuiyao; Hobbs, Alex; Katz, Neal; McCarthy, Ian G.; Murante, Giuseppe; Perret, Valentin; Puchwein, Ewald; Read, Justin I.; Saro, Alexandro; Teyssier, Romain; Thacker, Robert J.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 458, Issue 4, p.4052-4073
Advertised on:
6
2016
Citations
41
Refereed citations
40
Description
Building on the initial results of the nIFTy simulated galaxy cluster
comparison, we compare and contrast the impact of baryonic physics with
a single massive galaxy cluster, run with 11 state-of-the-art codes,
spanning adaptive mesh, moving mesh, classic and modern smoothed
particle hydrodynamics (SPH) approaches. For each code represented we
have a dark-matter-only (DM) and non-radiative (NR) version of the
cluster, as well as a full physics (FP) version for a subset of the
codes. We compare both radial mass and kinematic profiles, as well as
global measures of the cluster (e.g. concentration, spin, shape), in the
NR and FP runs with that in the DM runs. Our analysis reveals good
consistency ⪅20 per cent) between global properties of the
cluster predicted by different codes when integrated quantities are
measured within the virial radius R200. However, we see
larger differences for quantities within R2500, especially in
the FP runs. The radial profiles reveal a diversity, especially in the
cluster centre, between the NR runs, which can be understood
straightforwardly from the division of codes into classic SPH and
non-classic SPH (including the modern SPH, adaptive and moving mesh
codes); and between the FP runs, which can also be understood broadly
from the division of codes into those that include active galactic
nucleus feedback and those that do not. The variation with respect to
the median is much larger in the FP runs with different baryonic physics
prescriptions than in the NR runs with different hydrodynamics solvers.