CODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5
We present a stacked weak lensing analysis of 27 richness selected galaxy clusters at $0.40 \leqslant z \leqslant 0.62$ in the CODEX survey. The fields were observed in 5 bands with the CFHT. We measure the stacked surface mass density profile with a $14\sigma$ significance in the radial range $0.1...
| Asıl Yazarlar: | , , , , , , , , , , , , , , , |
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| Materyal Türü: | Journal article |
| Baskı/Yayın Bilgisi: |
Oxford University Press
2017
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| _version_ | 1826296412622553088 |
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| author | Cibirka, N Cypriano, E Brimioulle, F Gruen, D Erben, T van Waerbeke, L Miller, L Finoguenov, A Kirkpatrick, C Henry, J Rykoff, E Rozo, E Dupke, R Kneib, J Shan, H Spinelli, P |
| author_facet | Cibirka, N Cypriano, E Brimioulle, F Gruen, D Erben, T van Waerbeke, L Miller, L Finoguenov, A Kirkpatrick, C Henry, J Rykoff, E Rozo, E Dupke, R Kneib, J Shan, H Spinelli, P |
| author_sort | Cibirka, N |
| collection | OXFORD |
| description | We present a stacked weak lensing analysis of 27 richness selected galaxy clusters at $0.40 \leqslant z \leqslant 0.62$ in the CODEX survey. The fields were observed in 5 bands with the CFHT. We measure the stacked surface mass density profile with a $14\sigma$ significance in the radial range $0.1 < R\ Mpc\ h^{-1} < 2.5$. The profile is well described by the halo model, with the main halo term following an NFW profile and including the off-centring effect. We select the background sample using a conservative colour-magnitude method to reduce the potential systematic errors and contamination by cluster member galaxies. We perform a Bayesian analysis for the stacked profile and constrain the best-fit NFW parameters $M_{200c} = 6.6^{+1.0}_{-0.8} \times 10^{14} h^{-1} M_{\odot}$ and $c_{200c} = 3.7^{+0.7}_{-0.6}$. The off-centring effect was modelled based on previous observational results found for redMaPPer SDSS clusters. Our constraints on $M_{200c}$ and $c_{200c}$ allow us to investigate the consistency with numerical predictions and select a concentration-mass relation to describe the high richness CODEX sample. Comparing our best-fit values for $M_{200c}$ and $c_{200c}$ with other observational surveys at different redshifts, we find no evidence for evolution in the concentration-mass relation, though it could be mitigated by particular selection functions. Similar to previous studies investigating the X-ray luminosity-mass relation, our data suggests a lower evolution than expected from self-similarity. |
| first_indexed | 2024-03-07T04:15:56Z |
| format | Journal article |
| id | oxford-uuid:c96b0a81-cef4-4f32-92fb-f09d5433b543 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:15:56Z |
| publishDate | 2017 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:c96b0a81-cef4-4f32-92fb-f09d5433b5432022-03-27T06:59:02ZCODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c96b0a81-cef4-4f32-92fb-f09d5433b543Symplectic Elements at OxfordOxford University Press2017Cibirka, NCypriano, EBrimioulle, FGruen, DErben, Tvan Waerbeke, LMiller, LFinoguenov, AKirkpatrick, CHenry, JRykoff, ERozo, EDupke, RKneib, JShan, HSpinelli, PWe present a stacked weak lensing analysis of 27 richness selected galaxy clusters at $0.40 \leqslant z \leqslant 0.62$ in the CODEX survey. The fields were observed in 5 bands with the CFHT. We measure the stacked surface mass density profile with a $14\sigma$ significance in the radial range $0.1 < R\ Mpc\ h^{-1} < 2.5$. The profile is well described by the halo model, with the main halo term following an NFW profile and including the off-centring effect. We select the background sample using a conservative colour-magnitude method to reduce the potential systematic errors and contamination by cluster member galaxies. We perform a Bayesian analysis for the stacked profile and constrain the best-fit NFW parameters $M_{200c} = 6.6^{+1.0}_{-0.8} \times 10^{14} h^{-1} M_{\odot}$ and $c_{200c} = 3.7^{+0.7}_{-0.6}$. The off-centring effect was modelled based on previous observational results found for redMaPPer SDSS clusters. Our constraints on $M_{200c}$ and $c_{200c}$ allow us to investigate the consistency with numerical predictions and select a concentration-mass relation to describe the high richness CODEX sample. Comparing our best-fit values for $M_{200c}$ and $c_{200c}$ with other observational surveys at different redshifts, we find no evidence for evolution in the concentration-mass relation, though it could be mitigated by particular selection functions. Similar to previous studies investigating the X-ray luminosity-mass relation, our data suggests a lower evolution than expected from self-similarity. |
| spellingShingle | Cibirka, N Cypriano, E Brimioulle, F Gruen, D Erben, T van Waerbeke, L Miller, L Finoguenov, A Kirkpatrick, C Henry, J Rykoff, E Rozo, E Dupke, R Kneib, J Shan, H Spinelli, P CODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5 |
| title | CODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5 |
| title_full | CODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5 |
| title_fullStr | CODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5 |
| title_full_unstemmed | CODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5 |
| title_short | CODEX weak lensing: Concentration of galaxy clusters at z ~ 0.5 |
| title_sort | codex weak lensing concentration of galaxy clusters at z 0 5 |
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