LoCuSS: A Comparison of Sunyaev-Zel'dovich Effect and Gravitational Lensing Measurements of Galaxy Clusters Export

@article{citeulike:5133719, abstract = {We present the first measurement of the relationship between the Sunyaev-Zel'dovich effect signal and the mass of galaxy clusters that uses gravitational lensing to measure cluster mass, based on 14 X-ray luminous clusters at z\~{}0.2 from the Local Cluster Substructure Survey. We measure the integrated Compton y-parameter, Y, and total projected mass of the clusters (M\_GL) within a projected clustercentric radius of 350 kpc, corresponding to mean overdensities of 4000-8000 relative to the critical density. We find self-similar scaling between M\_GL and Y, with a scatter in mass at fixed Y of 32\%. This scatter exceeds that predicted from numerical cluster simulations, however, it is smaller than comparable measurements of the scatter in mass at fixed T\_X. We also find no evidence of segregation in Y between disturbed and undisturbed clusters, as had been seen with T\_X on the same physical scales. We compare our scaling relation to the Bonamente et al. relation based on mass measurements that assume hydrostatic equilibrium, finding no evidence for a hydrostatic mass bias in cluster cores (M\_GL = 0.98+/-0.13 M\_HSE), consistent with both predictions from numerical simulations and lensing/X-ray-based measurements of mass-observable scaling relations at larger radii. Overall our results suggest that the Sunyaev-Zel'dovich effect may be less sensitive than X-ray observations to the details of cluster physics in cluster cores.}, archivePrefix = {arXiv}, author = {Marrone, Daniel P. and Smith, Graham P. and Richard, Johan and Joy, Marshall and Bonamente, Massimiliano and Hasler, Nicole and Hamilton-Morris, Victoria and Kneib, Jean-Paul and Culverhouse, Thomas and Carlstrom, John E. and Greer, Christopher and Hawkins, David and Hennessy, Ryan and Lamb, James W. and Leitch, Erik M. and Loh, Michael and Miller, Amber and Mroczkowski, Tony and Muchovej, Stephen and Pryke, Clem and Sharp, Matthew K. and Woody, David}, citeulike-article-id = {5133719}, citeulike-linkout-0 = {http://arxiv.org/abs/0907.1687}, citeulike-linkout-1 = {http://arxiv.org/pdf/0907.1687}, day = {9}, eprint = {0907.1687}, keywords = {mass, mass\_estimation, rosat\_offspring, scaling, sze, wl}, month = {Jul}, posted-at = {2009-07-13 08:29:16}, priority = {2}, title = {LoCuSS: A Comparison of Sunyaev-Zel'dovich Effect and Gravitational Lensing Measurements of Galaxy Clusters}, url = {http://arxiv.org/abs/0907.1687}, year = {2009} }

TY - JOUR ID - citeulike:5133719 L3 - citeulike-article-id:5133719 N2 - We present the first measurement of the relationship between the Sunyaev-Zel'dovich effect signal and the mass of galaxy clusters that uses gravitational lensing to measure cluster mass, based on 14 X-ray luminous clusters at z~0.2 from the Local Cluster Substructure Survey. We measure the integrated Compton y-parameter, Y, and total projected mass of the clusters (M_GL) within a projected clustercentric radius of 350 kpc, corresponding to mean overdensities of 4000-8000 relative to the critical density. We find self-similar scaling between M_GL and Y, with a scatter in mass at fixed Y of 32%. This scatter exceeds that predicted from numerical cluster simulations, however, it is smaller than comparable measurements of the scatter in mass at fixed T_X. We also find no evidence of segregation in Y between disturbed and undisturbed clusters, as had been seen with T_X on the same physical scales. We compare our scaling relation to the Bonamente et al. relation based on mass measurements that assume hydrostatic equilibrium, finding no evidence for a hydrostatic mass bias in cluster cores (M_GL = 0.98+/-0.13 M_HSE), consistent with both predictions from numerical simulations and lensing/X-ray-based measurements of mass-observable scaling relations at larger radii. Overall our results suggest that the Sunyaev-Zel'dovich effect may be less sensitive than X-ray observations to the details of cluster physics in cluster cores. TI - LoCuSS: A Comparison of Sunyaev-Zel'dovich Effect and Gravitational Lensing Measurements of Galaxy Clusters KW - mass KW - mass_estimation KW - rosat_offspring KW - scaling KW - sze KW - wl AU - Marrone, Daniel AU - Smith, Graham AU - Richard, Johan AU - Joy, Marshall AU - Bonamente, Massimiliano AU - Hasler, Nicole AU - Hamilton-Morris, Victoria AU - Kneib, Jean-Paul AU - Culverhouse, Thomas AU - Carlstrom, John AU - Greer, Christopher AU - Hawkins, David AU - Hennessy, Ryan AU - Lamb, James AU - Leitch, Erik AU - Loh, Michael AU - Miller, Amber AU - Mroczkowski, Tony AU - Muchovej, Stephen AU - Pryke, Clem AU - Sharp, Matthew AU - Woody, David PY - 2009/Jul/09/ UR - http://arxiv.org/abs/0907.1687 ER -