The GiggleZ Simulation Suite
Overview
GiggleZ is a gigaparsec-scale N-body simulation suite built to support the WiggleZ Dark Energy Survey. It pairs a 1 Gpc/h, 21603-particle main run with four 125 Mpc/h control-volume simulations spanning a factor of 512 in mass resolution, enabling robust clustering and bias studies across cosmic time.
Why it matters: the combination of a very large volume and matched multi-resolution runs enables precise clustering statistics while quantifying resolution-driven systematics.
- Designed to support the WiggleZ Dark Energy Survey science program.
- Main and control-volume runs share initial conditions to isolate resolution effects.
- A full 3D rendering of a GiggleZ-HR cluster featured in the IMAX movie Hidden Universe.
Key Results
Concise summaries of flagship GiggleZ results, with details in the papers below.
- Quantified scale-dependent galaxy bias and clustering using a gigaparsec-scale volume.
- Enabled BAO distance measurements and competitive neutrino-mass constraints from WiggleZ data.
- Validated topology and homogeneity analyses with large-volume mock catalogs.
The following provides links to publications presenting GiggleZ results and images & movies highlighting the range of structures captured by the suite.
Selected Publications
Peer-reviewed work that introduces the suite and its scientific results.
GiggleZ suite and clustering
Characterising galaxy clustering across cosmic time.
BAO and scale-dependent bias
First BAO measurement from WiggleZ with GiggleZ-based bias modeling.
Neutrino mass constraints
Large-scale structure limits using WiggleZ distributions.
Topology distance measurement
Testing systematics for a novel cosmological distance method.
Cosmic homogeneity scale
Measuring the scale of homogeneity with GiggleZ validation.
Growth rate of structure
A new approach to measuring cosmic growth rates.
HI mock realizations
Fast mocks of neutral hydrogen during reionization.
SAGE galaxy formation model
SAGE applied to GiggleZ-MR and related runs.
Selected Movies
Animated views of representative structures, including the Hidden Universe cluster rendering and large-scale fly-throughs.
Selected Still Images
Stills highlighting cluster environments and large-scale slices from the main volume.
GiggleZ-HR cluster
Rich galaxy cluster at z=0 in the HR volume.
1 Gpc/h slice
25 Mpc/h thick slice through the full main volume.
200 Mpc/h section
Slice through a 200 Mpc/h region of the main volume.
25 Mpc/h section
Slice through a 25 Mpc/h region of the main volume.
Cluster distribution
Rich clusters across the main volume at z=0.
This publication presents the GiggleZ simulation suite and uses the GiggleZ-main simulation to characterise the clustering of galaxies accross cosmic time.
Click here to see the full paper on NASA ADS (if you do not have access to the journal, follow the arXiv link).