CLASH: the concentration-mass relation of galaxy clusters
We present a new determination of the concentration-mass relation for galaxy clusters based on our comprehensive lensing analysis of 19 X-ray selected galaxy clusters from the Cluster Lensing and Supernova Survey with Hubble (CLASH). Our sample spans a redshift range between 0.19 and 0.89. We combin...
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| Main Authors: | , , |
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| Format: | Article (Journal) Chapter/Article |
| Language: | English |
| Published: |
16 Apr 2014
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| In: |
Arxiv
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| Online Access: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1404.1376
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| Author Notes: | J. Merten, M. Meneghetti, M. Postman, K. Umetsu, A. Zitrin, E. Medezinski, M. Nonino, A. Koekemoer, P. Melchior, D. Gruen, L.A. Moustakas, M. Bartelmann, O. Host, M. Donahue, D. Coe, A. Molino, S. Jouvel, A. Monna, S. Seitz, N. Czakon, D. Lemze, J. Sayers, I. Balestra, P. Rosati, N. Benítez, A. Biviano, R. Bouwens, L. Bradley, T. Broadhurst, M. Carrasco, H. Ford, C. Grillo, L. Infante, D. Kelson, O. Lahav, R. Massey, J. Moustakas, E. Rasia, J. Rhodes, J. Vega, and W. Zheng |
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| 520 | |a We present a new determination of the concentration-mass relation for galaxy clusters based on our comprehensive lensing analysis of 19 X-ray selected galaxy clusters from the Cluster Lensing and Supernova Survey with Hubble (CLASH). Our sample spans a redshift range between 0.19 and 0.89. We combine weak lensing constraints from the Hubble Space Telescope (HST) and from ground-based wide field data with strong lensing constraints from HST. The result are reconstructions of the surface-mass density for all CLASH clusters on multi-scale grids. Our derivation of NFW parameters yields virial masses between 0.53 x 10^15 and 1.76 x 10^15 M_sol/h and the halo concentrations are distributed around c_200c ~ 3.7 with a 1-sigma significant negative trend with cluster mass. We find an excellent 4% agreement between our measured concentrations and the expectation from numerical simulations after accounting for the CLASH selection function based on X-ray morphology. The simulations are analyzed in 2D to account for possible biases in the lensing reconstructions due to projection effects. The theoretical concentration-mass (c-M) relation from our X-ray selected set of simulated clusters and the c-M relation derived directly from the CLASH data agree at the 90% confidence level. | ||
| 650 | 4 | |a Astrophysics - Cosmology and Nongalactic Astrophysics | |
| 650 | 4 | |a Astrophysics - Astrophysics of Galaxies | |
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