LoCuSS: A comparison of sunyaev-zel'dovich effect and gravitational-lensing measurements of galaxy clusters

Daniel P. Marrone, Graham P. Smith, Johan Richard, Marshall Joy, Massimiliano Bonamente, Nicole Hasler, Victoria Hamilton-Morris, Jean Paul Kneib, Thomas Culverhouse, John E. Carlstrom, Christopher Greer, David Hawkins, Ryan Hennessy, James W. Lamb, Erik M. Leitch, Michael Loh, Amber Miller, Tony Mroczkowski, Stephen Muchovej, Clem PrykeMatthew K. Sharp, David Woody

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


We present the first measurement of the relationship between the Sunyaev-Zel'dovich effect (SZE) 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 350kpc, 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 TX . We also find no evidence of segregation in Y between disturbed and undisturbed clusters, as had been seen with TX 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 SZE may be less sensitive than X-ray observations to the details of cluster physics in cluster cores.

Original languageEnglish (US)
Pages (from-to)L114-L118
JournalAstrophysical Journal
Issue number2 PART 2
StatePublished - 2009


  • Cosmology: observations
  • Galaxies: clusters: general
  • Gravitational lensing

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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