Volume 649, May 2021
|Number of page(s)||18|
|Section||Cosmology (including clusters of galaxies)|
|Published online||10 May 2021|
Impact of the calibration of the halo mass function on galaxy cluster number count cosmology
IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
2 Université de Paris, CNRS, Astroparticule et Cosmologie, 75006 Paris, France
3 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
Accepted: 1 March 2021
The halo mass function (HMF) is a critical element in cosmological analyses of galaxy cluster catalogs. We quantify the impact of uncertainties in HMF parameters on cosmological constraints from cluster catalogs similar to those from Planck, those expected from the Euclid, Roman, and Rubin surveys, and from a hypothetical larger future survey. We analyze simulated catalogs in each case, gradually loosening priors on HMF parameters to evaluate the degradation in cosmological constraints. While current uncertainties on HMF parameters do not substantially impact Planck-like surveys, we find that they can significantly degrade the cosmological constraints for a Euclid-like survey. Consequently, the current precision on the HMF is not sufficient for Euclid, Roman, Rubin or possible larger surveys. Future experiments will have to properly account for uncertainties in HMF parameters, and it will be necessary to improve the precision of HMF fits to avoid weakening constraints on cosmological parameters.
Key words: galaxies: clusters: general / large-scale structure of Universe / cosmological parameters
© E. Artis et al. 2021
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.