Existing Data:

Power spectra catalogues

Accurate extraction of cosmological parameters from upcoming weak lensing surveys relies on knowledge of the total matter power spectrum at percent level at scales k < 10 h/Mpc, for which modelling the impact of baryonic physics is crucial. In Chisari et al (2018) , we presented measurements of the total matter power spectrum from the Horizon cosmological hydrodynamical simulations: a dark matter-only run, one with full baryonic physics, and another lacking feedback from Active Galactic Nuclei (AGN). The simulations correspond to cosmological boxes of 100 Mpc/h on each side and share the same initial conditions and WMAP7 cosmology. We found a suppression of power at intermediate scales (k~10 h/Mpc) of <15% at z=0, and an enhancement of a factor of a few at smaller scales due to the more efficient cooling and star formation in the baryonic runs. The redshift evolution of the effect of baryons on the matter power spectrum is non-monotonic throughout the range z=0-5 due to an interplay between AGN feedback and gas pressure, and the growth of structure. Total matter power spectra from the Horizon simulation are made publicly available here. There are three files, each of them corresponding to a different simulation run. Hz-AGN refers to the full baryonic physics run. Hz-noAGN corresponds to the run with no AGN feedback. Hz-DM is a dark matter only run. The first row of the files indicates the quantities in each column: the first one is the wavenumber, k [h/Mpc]; the following ones are dimensionless power spectra (\Delta^2) at different redshifts, as indicated by the header. Notice that redshifts are not the same across files. If you use these results in your work, we ask that you cite Dubois et al. (2014) and Chisari et al (2018).

Photometric catalogues and spectra

Last update: 20/04/2020

Using the light-cone from the cosmological hydrodynamical simulation Horizon-AGN, we produced photometric catalogues below redshift 4 with apparent magnitudes in COSMOS, DES, LSST-like, and Euclid-like filters at depths comparable to these surveys. Virtual photometry accounts for the complex star formation history and metal enrichment of Horizon-AGN galaxies, and consistently includes magnitude errors, dust attenuation and absorption by inter-galactic medium. Photometric redshifts, stellar masses and star-formation rates are also produced through SED-fitting with LePhare in the following configurations:

  1. COSMOS configuration: same filters, same depths, same templates as for COSMOS2015 catalogue; see HorizonAGN_LAIGLE-DAVIDZON+2019_COSMOS_v1.6.fits
  2. EUCLID+DES configuration; LSST configuration; EUCLID+LSST configuration; see HorizonAGN_LAIGLE-DAVIDZON+2019_EUC-LSST_v1.5.fits

Please attentively read README_HZAGN_LAIGLE-DAVIDZON_2019 before using these catalogues.

Rest-frame spectra for all galaxies are also provided in the following files (the initial catalogue has been split into 2 sub-samples to avoid manipulating very heavy files): 0<z<2; 2<z<4.
README_HZAGN_SPECTRA provides more details.

A full description of the catalogues and computation of spectra is available in Laigle et al. 2019 and Davidzon et al. 2019. Please cite these two papers along with Dubois et al. 2014 if you use these catalogues. More data are available on demand (e.g. photometry without dust or IGM extinction, absolute magnitudes, spectra, etc. ). Would you have any question on these catalogues, please contact: clotilde.laigle@iap.fr and iary.davidzon@nbi.ku.dk

New Data:

Please do not hesitate to contact us in order to have access to the galaxy/black hole catalogues, etc.