Ayromlou+21b catalogues for download
The following catalogues contain output files in hdf5 format from the Ayromlou et al. (2021b) version of the L-Galaxies semi-analytical model of galaxy formation. These catalogues are based on the Millennium and Millennium-II dark matter simulations scaled to the PLANCK-1 cosmology. Volume_MR =
\((480.3\ \rm{Mpc}/h)^3\), Volume_MRII = \((96.1\ \rm{Mpc}/h)^3\).
Additional output files are also available upon request to ayromlou@mpa-garching.mpg.de or ayromlou@gmail.com. Furthermore, SQL-based catalogues are provided in the Millennium Database, for which you will need to register first (the registration is free).
The main catalogue contains galaxy properties such as stellar mass, gas mass, star formation rate, etc.
Additional properties, such as those for the radially-resolved gas and stellar discs, are provided in the additional catalogue, with matched indices between the two catalogues.
A full description of all quantities in both these catalogues is provided here:
Ayromlou2021_Catalogue_Description.pdf
Basic python scripts to read these snapshot catalogues are provided here:
Read_LGal_A2021_Output_Python.zip
The units are as follows:
- masses - \(10^{10}\mathrm{M}_{\odot}/h\)
(multiply by \(10^{10}/h\) to get
\(\mathrm{M}_{\odot}\))
- chemical element masses - \(\mathrm{M}_{\odot}\)
- positions - \(\mathrm{Mpc}/h\)
(divide by \(h\) to get
\(\mathrm{Mpc}\))
- velocities - \(\mathrm{km/s}\)
- rates - \(\mathrm{M}_{\odot}/\mathrm{yr}\)
- spins - \(\mathrm{Mpc}/h \:\: \mathrm{km/s}\)
Conversions between snapshot number, redshift, scale factor, cosmic time fraction, cosmic time, Hubble parameter, and lookback time for a Planck-1 cosmology are provided here:
MR: Millennium_Planck1_Snapshots_Redshifts.txt
MR-II: MillenniumII_Planck1_Snapshots_Redshifts.txt
For catalogues containing star formation histories, the corresponding times and widths of each bin are not saved in the galaxy structure
since they are the same for all galaxies at a given snapshot. These can be found here: