Introduction¶
This service provides web based remote access to the FLAMINGO simulations described in Schaye et al (2023) and Kugel et al (2023). The FLAMINGO data release is presented in Helly et al (2026).
FLAMINGO simulation data products¶
The following data products are available:
Snapshots of the full distribution of particles (dark matter, gas, stars, black holes and neutrinos) at a series of output times between redshift z=15 and the present day
Halo catalogues and merger trees generated using the HBT-HERONS halo finder (Forouhar Moreno et al. 2025) with a wide range of halo properties computed using the SOAP post-processing tool (McGibbon et al. 2025.)
Full sky lightcone particle outputs, where each simulation particle is output as it crosses the past lightcone of an observer placed somewhere in the simulation volume
Full sky HEALPix maps of various quantities evaluated in spherical shells around each lightcone observer. These include the total mass in gas, stars and dark matter, the X-ray luminosity of the gas in several bands, measurements of the thermal and kinetic Sunyaev–Zeldovich effects, the dispersion measure and weak lensing convergence.
Approximate lightcone halo catalogues created by using black hole particles to trace halo positions between snapshots
Documentation¶
See the links in the side bar on the left for more information on how to use this service and full descriptions of the available data products.
Downloading simulation data¶
All outputs are stored in the form of HDF5 files. Complete files and directories (such as a full simulation snapshot or a halo catalogue) can be downloaded directly for local analysis. We provide a web-based file browser which can be used to locate files of interest and view their contents.
Accessing subsets of the data¶
We also provide a mechanism to request parts of HDF5 files without downloading the whole file. This allows more granular access: it is possible, for example, to download just the star particles from some specified region in a simulation snapshot or download only a few properties of interest from a halo catalogue.
We provide an adapted version of the swiftsimio python module which can transparently make use of this service, and a more generic hdfstream module which allows downloads of arbitrary HDF5 data using a similar interface to h5py. We also plan to adapt pynbody to access this service.
