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Date and Time of the Query: 2019-04-20 T09:54:41 PDT
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For refcode 2005ApJ...628L..97D:
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2005ApJ...628L..97D Caustic and Weak-Lensing Estimators of Galaxy Cluster Masses Antonaldo Diaferio, Margaret J. Geller, and Kenneth J. Rines Abstract. There are only two methods for estimating the mass distribution in the outer regions of galaxy clusters, where virial equilibrium does not hold: weak gravitational lensing and identification of caustics in redshift space. For the first time, we apply both methods to three clusters: Abell 2390, MS 1358.4+6245, and Cl 0024+1654. The two measures are in remarkably good agreement out to ~2 h^-1^ Mpc from the cluster centers. This result demonstrates that the caustic technique is a valuable complement to weak lensing. With a few tens of redshifts per square comoving megaparsec within the cluster, the caustic method is applicable for any z<~0.5. Keywords: Cosmology: Miscellaneous, Cosmology: Observations, Galaxies: Clusters: Individual: Name: Abell 2390, Galaxies: Clusters: Individual: Cl 0024+1654, Galaxies: Clusters: Individual: MS 1358.4+6245, Cosmology: Gravitational Lensing
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