TY - JOUR
T1 - Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-Ray, SZ, and Lensing Data
AU - Siegel, Seth R.
AU - Sayers, Jack
AU - Mahdavi, Andisheh
AU - Donahue, Megan
AU - Merten, Julian
AU - Zitrin, Adi
AU - Meneghetti, Massimo
AU - Umetsu, Keiichi
AU - Czakon, Nicole G.
AU - Golwala, Sunil R.
AU - Postman, Marc
AU - Koch, Patrick M.
AU - Koekemoer, Anton M.
AU - Lin, Kai Yang
AU - Melchior, Peter
AU - Molnar, Sandor M.
AU - Moustakas, Leonidas
AU - Mroczkowski, Tony K.
AU - Pierpaoli, Elena
AU - Shitanishi, Jennifer
N1 - Publisher Copyright:
© 2018. The American Astronomical Society. All rights reserved.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - We present a joint analysis of Chandra X-ray observations, Bolocam thermal Sunyaev-Zel'dovich (SZ) effect observations, Hubble Space Telescope (HST) strong-lensing data, and HST and Subaru Suprime-Cam weak-lensing data. The multiwavelength data set is used to constrain parametric models for the distribution of dark and baryonic matter in a sample of six massive galaxy clusters selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). For five of the six clusters, the multiwavelength data set is well described by a relatively simple model that assumes spherical symmetry, hydrostatic equilibrium, and entirely thermal pressure support. The joint analysis yields considerably better constraints on the total mass and concentration of the clusters compared to analysis of any one data set individually. The resulting constraints are consistent with simulation-based predictions for the concentration-mass relation. The subsample of five galaxy clusters is used to place an upper limit on the fraction of pressure support in the intracluster medium (ICM) due to nonthermal processes, such as turbulence and bulk flow of the gas. We constrain the nonthermal pressure fraction at r 500c to be <0.11 at 95% confidence. This is in tension with state-of-the-art hydrodynamical simulations, which predict a nonthermal pressure fraction of ≈0.25 at r 500c for clusters of similar mass and redshift. This tension may be explained by the sample selection and/or our assumption of spherical symmetry.
AB - We present a joint analysis of Chandra X-ray observations, Bolocam thermal Sunyaev-Zel'dovich (SZ) effect observations, Hubble Space Telescope (HST) strong-lensing data, and HST and Subaru Suprime-Cam weak-lensing data. The multiwavelength data set is used to constrain parametric models for the distribution of dark and baryonic matter in a sample of six massive galaxy clusters selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). For five of the six clusters, the multiwavelength data set is well described by a relatively simple model that assumes spherical symmetry, hydrostatic equilibrium, and entirely thermal pressure support. The joint analysis yields considerably better constraints on the total mass and concentration of the clusters compared to analysis of any one data set individually. The resulting constraints are consistent with simulation-based predictions for the concentration-mass relation. The subsample of five galaxy clusters is used to place an upper limit on the fraction of pressure support in the intracluster medium (ICM) due to nonthermal processes, such as turbulence and bulk flow of the gas. We constrain the nonthermal pressure fraction at r 500c to be <0.11 at 95% confidence. This is in tension with state-of-the-art hydrodynamical simulations, which predict a nonthermal pressure fraction of ≈0.25 at r 500c for clusters of similar mass and redshift. This tension may be explained by the sample selection and/or our assumption of spherical symmetry.
KW - galaxies: clusters: general
KW - galaxies: clusters: individual (Abell 383, Abell 611, 1423.8+2404, MACS J1532.8+3021)
KW - galaxies: clusters: intracluster medium
UR - http://www.scopus.com/inward/record.url?scp=85049948276&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/aac5f8
DO - 10.3847/1538-4357/aac5f8
M3 - Article
AN - SCOPUS:85049948276
SN - 0004-637X
VL - 861
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 71
ER -