CODEX weak lensing mass catalogue and implications on the mass–richness relation

Journal Article · Wed Dec 23 00:00:00 EST 2020 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/staa3936· OSTI ID:1766077

Kiiveri, K. ^[1]; Gruen, D.  ^[2]; Finoguenov, A.  ^[1]; Erben, T. ^[3]; van Waerbeke, L. ^[4]; Rykoff, E. ^[2]; Miller, L. ^[5]; Hagstotz, S. ^[6]; Dupke, R. ^[7]; Patrick Henry, J. ^[8]; Kneib, J.-P. ^[9]; Gozaliasl, G.  ^[1]; Kirkpatrick, C. C.  ^[1]; Cibirka, N. ^[10]; Clerc, N.  ^[11]; Costanzi, M. ^[12]; Cypriano, E. S. ^[13]; Rozo, E. ^[14]; Shan, H. ^[15]; Spinelli, P. ^[16] ; Valiviita, J. ^[17]; Weller, J. ^[18]

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1. Univ. of Helsinki (Finland)
2. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
3. Argelander-Institut für Astronomie, Bonn (Germany)
4. Univ. of British Columbia, Vancouver, BC (Canada)
5. Univ. of Oxford (United Kingdom)
6. Stockholm Univ. (Sweden)
7. Observatório Nacional, Rio de Janeiro (Brazil); Univ. of Michigan, Ann Arbor, MI (United States); Univ. of Alabama, Tuscaloosa, AL (United States); Eureka Scientific Inc., Oakland, CA (United States)
8. Inst. for Astronomy, Honolulu, HI (United States)
9. Ecole Polytechnique Federale Lausanne (Switzerland); Aix Marseille Univ., Marseille (France)
10. Univ. of Sao Paulo (Brazil); Ludwig Maximilian Univ. of Munich, Munich (Germany)
11. Univ. de Toulouse (France)
12. Istituto Nazionale di Astrofisica (INAF), Trieste (Italy)
13. Univ. of Sao Paulo (Brazil)
14. Univ. of Arizona, Tucson, AZ (United States)
15. Shanghai Astronomical Observatory (SHAO) (China)
16. Museu de Astronomia e Ciências Afins (MAST), Rio de Janeiro (Brazil)
17. Univ. of Helsinki (Finland); Univ. of Jyvaskyla (Finland)
18. Ludwig Maximilian Univ. of Munich, Munich (Germany); Excellence Cluster Origins, Garching (Germany)

The COnstrain Dark Energy with X-ray clusters (CODEX) sample contains the largest flux limited sample of X-ray clusters at 0.35 < z < 0.65. It was selected from ROSAT data in the 10 000 square degrees of overlap with BOSS, mapping a total number of 2770 high-z galaxy clusters. We present here the full results of the CFHT CODEX programme on cluster mass measurement, including a reanalysis of CFHTLS Wide data, with 25 individual lensing-constrained cluster masses. We employ lensfit shape measurement and perform a conservative colour–space selection and weighting of background galaxies. Using the combination of shape noise and an analytic covariance for intrinsic variations of cluster profiles at fixed mass due to large-scale structure, miscentring, and variations in concentration and ellipticity, we determine the likelihood of the observed shear signal as a function of true mass for each cluster. We combine 25 individual cluster mass likelihoods in a Bayesian hierarchical scheme with the inclusion of optical and X-ray selection functions to derive constraints on the slope α, normalization β, and scatter σln λ|μ of our richness–mass scaling relation model in log-space: $${\langle {\rm In}\,\, \lambda\!\!\mid\!\!\mu\rangle = \alpha\mu + \beta,} $$ with μ = ln (M_200c/M_piv), and M_piv = 10^14.81M_⊙. We find a slope $$\alpha = 0.49^{+0.20}_{-0.15}$$, normalization $$\exp (\beta) = 84.0^{+9.2}_{-14.8}$$, and $$\sigma _{\ln \lambda | \mu } = 0.17^{+0.13}_{-0.09}$$ using CFHT richness estimates. In comparison to other weak lensing richness–mass relations, we find the normalization of the richness statistically agreeing with the normalization of other scaling relations from a broad redshift range (0.0 < z < 0.65) and with different cluster selection (X-ray, Sunyaev–Zeldovich, and optical).

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); Science and Technology Facilities Council (STFC) (United Kingdom); Finnish Academy; Shanghai Committee of Science and Technology; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Laboratory Directed Research and Development (LDRD) Program; Brazilian National Council for Scientific and Technological Development (CNPq); Coordination for the Improvement of Higher Education Personnel (CAPES); S˜ao Paolo Research Foundation (FAPESP); Science and Technology Facilities Council (STFC); Science and Technology Commission of Shanghai Municipality
• Grant/Contract Number: AC02-76SF00515; ST/N000919/1; 266918; 19ZR1466600; 292882
• OSTI ID: 1766077
• Alternate ID(s): OSTI ID: 1765947
• Report Number(s): SLAC-PUB-17589; TRN: US2206288
• Journal Information: Monthly Notices of the Royal Astronomical Society, Vol. 502, Issue 1; ISSN 0035-8711
• Publisher: Royal Astronomical Society
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
galaxy: clusters
cosmology: observations
gravitational lensing: weak
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
clusters of galaxies
dark energy
X-ray observations
gravitational lensing