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CLUMP-3D: Testing ΛCDM with Galaxy Cluster Shapes

Sereno, Mauro and Umetsu, Keiichi and Ettori, Stefano and Sayers, Jack and Chiu, I-Non and Meneghetti, Massimo and Vega-Ferrero, Jesús and Zitrin, Adi (2018) CLUMP-3D: Testing ΛCDM with Galaxy Cluster Shapes. Astrophysical Journal Letters, 860 (1). Art. No. L4. ISSN 2041-8213. doi:10.3847/2041-8213/aac6d9.

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The ΛCDM 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 ΛCDM 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 ΛCDM 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Sereno, Mauro0000-0003-0302-0325
Umetsu, Keiichi0000-0002-7196-4822
Ettori, Stefano0000-0003-4117-8617
Sayers, Jack0000-0002-8213-3784
Chiu, I-Non0000-0002-5819-6566
Meneghetti, Massimo0000-0003-1225-7084
Vega-Ferrero, Jesús0000-0003-2338-5567
Zitrin, Adi0000-0002-0350-4488
Additional Information:© 2018 The American Astronomical Society. Received 2018 March 30; revised 2018 May 5; accepted 2018 May 18; published 2018 June 7. The authors thank Rossella Cassano and Gianfranco Brunetti for useful discussions, and Gustavo Yepes for supplying the MUSIC-2 simulations performed at the Barcelona Supercomputing Center, Spain. M.S. and S.E. acknowledge support from the contracts ASI-INAF I/009/10/0, NARO15 ASI-INAF I/037/12/0, ASI 2015-046-R.0 and ASI-INAF n.2017-14-H.0. K.U. acknowledges support from the Ministry of Science and Technology of Taiwan (grants 103-2112-M-001-030-MY3 and 106-2628-M-001-003-MY3) and from the Academia Sinica Investigator Award. J.S. was supported by NSF/AST-1617022. M.M. acknowledges support from MAECI and contracts ASI-INAF/I/023/12/0 and ASI n. I/023/12/0. J.V.-F. was supported by AYA2015-64508-P (MINECO/FEDER).
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)I/009/10/0
Agenzia Spaziale Italiana (ASI)I/037/12/0
Agenzia Spaziale Italiana (ASI)2015-046-R.0
Agenzia Spaziale Italiana (ASI)2017-14-H.0
Ministry of Science and Technology (Tapei)103-2112-M-001-030-MY3
Ministry of Science and Technology (Tapei)106-2628-M-001-003-MY3
Academia SinicaUNSPECIFIED
Agenzia Spaziale Italiana (ASI)I/023/12/0
Agenzia Spaziale Italiana (ASI)I/023/12/0
Ministerio de Economía, Industria y Competitividad (MINECO)AYA2015-64508-P
Subject Keywords:galaxies: clusters: general – galaxies: clusters: intracluster medium – gravitational lensing: weak
Issue or Number:1
Record Number:CaltechAUTHORS:20180607-104511392
Persistent URL:
Official Citation:Mauro Sereno et al 2018 ApJL 860 L4
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86882
Deposited By: Tony Diaz
Deposited On:07 Jun 2018 18:29
Last Modified:15 Nov 2021 20:43

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