Photometric redshifts and galaxy clusters for DES DR2, DESI DR9 and HSC-SSP PDR3

Abstract

Photometric redshift (photo-z) is a fundamental parameter for multi-wavelength photometric surveys, while galaxy clusters are important cosmological probers and ideal objects for exploring the dense environmental impact on galaxy evolution. We extend our previous work on estimating photo-z and detecting galaxy clusters to the latest data releases of the Dark Energy Spectroscopic Instrument (DESI) imaging surveys, Dark Energy Survey (DES), and Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) imaging surveys and make corresponding catalogs publicly available for more extensive scientific applications. The photo-z catalogs include accurate measurements of photo-z and stellar mass for about 320, 293, and 134 million galaxies with r<23, i<24, and i<25 in DESI DR9, DES DR2, and HSC-SSP PDR3 data, respectively. The photo-z accuracy is about 0.017, 0.024, and 0.029 and the general redshift coverage is z<1, z<1.2, and z<1.6, respectively for those three surveys. The uncertainties of the logarithmic stellar mass that is inferred from stellar population synthesis fitting is about 0.2 dex. With the above photo-z catalogs, galaxy clusters are detected using a fast cluster-finding algorithm. A total of 532,810, 86,963, and 36,566 galaxy clusters with the number of members larger than 10 are discovered for DESI, DES, and HSC-SSP, respectively. Their photo-z accuracy is at the level of 0.01. The total mass of our clusters are also estimated by using the calibration relations between the optical richness and the mass measurement from X-ray and radio observations. The catalogs including(A) Photo-z and stellar mass1. desdr2_galaxy_cspcat: total catalog of photo-z and stellar mass for DES DR2  photoz_desdr2: dividing the catalog into smaller files  filename: desdr2_galaxy_cspcat_raXXX_YYY.fits, where XXX and YYY is the lower and upper limits of R.A in degrees2. desidr9_galaxy_cspcat.fits: total catalog of photo-z and stellar mass for DESI DR9  photoz_desidr9: dividing the catalog into smaller files  filename: desidr9_galaxy_cspcat_raXXX_YYY.fits, where XXX and YYY is the lower and upper limits of R.A in degrees3. hscpdr3_wide_galaxy_cspcat.fits: total catalog of photo-z and stellar mass for HSC-SSP PDR3  photoz_hscpdr3: dividing the catalog into smaller files  filename: hscpdr3_wide_galaxy_cspcat_raXXX_YYY.fits, where XXX and YYY is the lower and upper limits of R.A in degrees(B) Galaxy clusters1. galaxy_clusters_desdr2.fits: catalog of galaxy clusters for DES DR22. galaxy_clusters_desidr9.fits: catalog of galaxy clusters for DESI DR93. galaxy_clusters_hscpdr3_wide.fits: catalog of galaxy clusters for HSC-SSP PDR3