STINGS/COCO Simulations Data Release 1

With Cooper et al. (2025), we release the stellar particle data for approximately 6400 central galaxies in the Coco simulation (Hellwing et al. 2016) with virial mass M_vir > 10^10 M⊙. This model is based on the STINGS particle tagging technique combined with the semi-analytic model of Lacey et al. (2016).

For the data model of these files, related python scripts and other details, please see https://github.com/nthu-ga/stings-data.

The data are provided in HDF5 format. Each file contains data for a "cutout" around one dark matter halo, including all its satellites.

The files are organized in the following directory structure:

/dr1/cutouts/lacey16/3pc/0153/NNNN

where NNNN is a zero-padded integer ranging (in this release) from 0000 to 0099. This corresponds to the colum IDIR in the galaxies.fits table:

/dr1/cutouts/lacey16/3pc/0153/galaxies.fits

For distribution via Zenodo, data for several IDIRs have been grouped into tarballs. Each .tar.gz file contains data for 5 IDIRs. These files unpack to the directory structure described above. For example, the 0020_0024.tar.gz file unpacks to /dr1/cutouts/lacey16/3pc/0153/[0020,0021,0022,0023,0024].

Data file names are of the form subhalo_{SUBHALOINDEX}_153.hdf5 where {SUBHALOINDEX} is the value of SUBHALOINDEX in galaxies.fits.

The path to the particle data for to a given row in galaxies.fits can therefore be constructed from the IDIR and SUBHALOINDEX columns, as follows:

/dr1/cutouts/lacey16/3pc/0153/{IDIR}/subhalo_{SUBHALOINDEX}_153.hdf5