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Date and Time of the Query: 2019-07-19 T13:59:06 PDT
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For refcode 2018ApJ...860L...4S:
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Copyright by American Astronomical Society. Reproduced by permission
2018ApJ...860L...4S CLUMP-3D: Testing LambdaCDM with Galaxy Cluster Shapes Sereno, Mauro; Umetsu, Keiichi; Ettori, Stefano; Sayers, Jack; Chiu, I.-Non; Meneghetti, Massimo; Vega-Ferrero, Jesus; Zitrin, Adi Abstract. The LambdaCDM model of structure formation makes strong predictions on the concentration and shape of dark matter (DM) halos, which are determined by mass accretion processes. Comparison between predicted shapes and observations provides a geometric test of the LambdaCDM model. Accurate and precise measurements needs a full three-dimensional (3D) analysis of the cluster mass distribution. We accomplish this with a multi-probe 3D analysis of the X-ray regular Cluster Lensing and Supernova survey with Hubble (CLASH) clusters combining strong and weak lensing, X-ray photometry and spectroscopy, and the Sunyaev--Zel'dovich effect (SZe). The cluster shapes and concentrations are consistent with LambdaCDM predictions. The CLASH clusters are randomly oriented, as expected given the sample selection criteria. Shapes agree with numerical results for DM-only halos, which hints at baryonic physics being less effective in making halos rounder. Key words: galaxies: clusters: general, galaxies: clusters: intracluster medium, gravitational lensing: weak
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