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CODEX weak lensing ...
CODEX weak lensing mass catalogue and implications on the mass-richness relation
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Kiiveri, K. (author)
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Gruen, D. (author)
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Finoguenov, A. (author)
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Erben, T. (author)
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van Waerbeke, L. (author)
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Rykoff, E. (author)
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Miller, L. (author)
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- Hagstotz, Steffen (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Dupke, R. (author)
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Henry, J. Patrick (author)
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Kneib, J.-P. (author)
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Gozaliasl, G. (author)
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Kirkpatrick, C. C. (author)
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Cibirka, N. (author)
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Clerc, N. (author)
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Costanzi, M. (author)
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Cypriano, E. S. (author)
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Rozo, E. (author)
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Shan, H. (author)
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Spinelli, P. (author)
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Valiviita, J. (author)
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Weller, J. (author)
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(creator_code:org_t)
- 2020-12-23
- 2021
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 502:1, s. 1494-1526
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Abstract
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- 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,} $| with μ = ln (M200c/Mpiv), and Mpiv = 1014.81M⊙. We find a slope |$\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).
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- gravitational lensing: weak
- galaxies: clusters: general
- cosmology: observations
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Kiiveri, K.
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Gruen, D.
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Finoguenov, A.
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Erben, T.
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van Waerbeke, L.
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Rykoff, E.
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show more...
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Miller, L.
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Hagstotz, Steffe ...
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Dupke, R.
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Henry, J. Patric ...
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Kneib, J.-P.
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Gozaliasl, G.
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Kirkpatrick, C. ...
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Cibirka, N.
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Clerc, N.
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Costanzi, M.
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Cypriano, E. S.
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Rozo, E.
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Shan, H.
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Spinelli, P.
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Valiviita, J.
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Weller, J.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Monthly notices ...
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Stockholm University