Cosmological constraints from DES Y1 cluster abundances and SPT multiwavelength data
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We perform a joint analysis of the counts of redMaPPer clusters selected from the Dark Energy Survey (DES) year 1 data and multiwavelength follow-up data collected within the 2500 deg2 South Pole Telescope (SPT) Sunyaev-Zel’dovich (SZ) survey. The SPT follow-up data, calibrating the richness-mass relation of the optically selected redMaPPer catalog, enable the cosmological exploitation of the DES cluster abundance data. To explore possible systematics related to the modeling of projection effects, we consider two calibrations of the observational scatter on richness estimates: a simple Gaussian model which account only for the background contamination (BKG), and a model which further includes contamination and incompleteness due to projection effects (PRJ). Assuming either a ΛCDM+Σmν or wCDM+Σmν cosmology, and for both scatter models, we derive cosmological constraints consistent with multiple cosmological probes of the low and high redshift Universe, and in particular with the SPT cluster abundance data. Furthermore, this result demonstrates that the DES Y1 and SPT cluster counts provide consistent cosmological constraints, if the same mass calibration data set is adopted. It thus supports the conclusion of the DES Y1 cluster cosmology analysis which interprets the tension observed with other cosmological probes in terms of systematics affecting the stacked weak lensing analysis of optically selected low–richness clusters. Finally, we analyze the first combined optically SZ selected cluster catalog obtained by including the SPT sample above the maximum redshift probed by the DES Y1 redMaPPer sample (z=0.65). Besides providing a mild improvement of the cosmological constraints, this data combination serves as a stricter test of our scatter models: the PRJ model, providing scaling relations consistent between the two abundance and multiwavelength follow-up data, is favored over the BKG model.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); MICINN; National Science Foundation (NSF); INCT; CNPq; Eurpean Research Council (ERC); CINECA; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
- Contributing Organization:
- DES Collaboration; SPT Collaboration
- Grant/Contract Number:
- SC0019193; AC02-07CH11359; AC02-76SF00515; AC02-05CH11231; FP7/2007-2013; 465376/2014-2; SEV-2016-0588; SEV-2016-0597; MDM-2015-0509; PGC2018-094773; PGC2018-102021; ESP2017-89838; AST-1536171; 2012B-0001; AST-1814719; AST-1138766; 291329; 240672; 306478; 716762; INA17_C5B32; INA20_C6B51; AC05-00OR22725
- OSTI ID:
- 1871632
- Alternate ID(s):
- OSTI ID: 1712760; OSTI ID: 1777284; OSTI ID: 1807208
- Report Number(s):
- FERMILAB-PUB-20-541-AD-AE-SCD; DES-2020-0588; arXiv:2010.13800; 2012B-0001; AST-1138766; AST-1536171; AST-1814719; 465376/2014-2; ESP2017-89838; PGC2018-094773; PGC2018-102021; SEV-2016-0588; SEV-2016-0597; MDM-2015-0509; FP7/2007-2013; 240672; 291329; 306478; 716762; INA20_C6B51; INA17_C5B32; TRN: US2306782
- Journal Information:
- Physical Review. D., Vol. 103, Issue 4; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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