The dynamical state and mass-concentration relation of galaxy clusters

被引:97
作者
Ludlow, Aaron D. [1 ]
Navarro, Julio F. [2 ]
Li, Ming [3 ,4 ]
Angulo, Raul E. [3 ]
Boylan-Kolchin, Michael [5 ]
Bett, Philip E. [1 ]
机构
[1] Argelander Inst Astron, D-53121 Bonn, Germany
[2] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada
[3] Max Planck Inst Astrophys, D-85740 Garching, Germany
[4] Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
[5] Univ Calif Irvine, Ctr Galaxy Evolut, Irvine, CA 92697 USA
基金
欧洲研究理事会;
关键词
galaxies: clusters: general; cosmology: theory; dark matter; COLD DARK-MATTER; HALO CONCENTRATIONS; POWER SPECTRUM; EVOLUTION; SIMULATIONS; CONSTRAINTS; DEPENDENCE; COSMOLOGY; PROJECT; SCATTER;
D O I
10.1111/j.1365-2966.2012.21892.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We use the Millennium Simulation series to study how the dynamical state of dark matter haloes affects the relation between mass and concentration. We find that a large fraction of massive systems are identified when they are substantially out of equilibrium and in a particular phase of their dynamical evolution: the more massive the halo, the more likely it is found at a transient stage of high concentration. This state reflects the recent assembly of massive haloes and corresponds to the first pericentric passage of recently accreted material when, before virialization, the kinetic and potential energies reach maximum and minimum values, respectively. This result explains the puzzling upturn in the mass-concentration relation reported in recent work for massive haloes; indeed, the upturn disappears when only dynamically relaxed systems are considered in the analysis. Our results warn against applying simple equilibrium models to describe the structure of rare, massive galaxy clusters and urge caution when extrapolating scaling laws calibrated on lower mass systems, where such deviations from equilibrium are less common. The evolving dynamical state of galaxy clusters ought to be carefully taken into account if cluster studies are to provide precise cosmological constraints.
引用
收藏
页码:1322 / 1328
页数:7
相关论文
共 27 条
[1]   Planck early results. XII. Cluster Sunyaev-Zeldovich optical scaling relations [J].
Aghanim, N. ;
Arnaud, M. ;
Ashdown, M. ;
Aumont, J. ;
Baccigalupi, C. ;
Balbi, A. ;
Banday, A. J. ;
Barreiro, R. B. ;
Bartelmann, M. ;
Bartlett, J. G. ;
Battaner, E. ;
Benabed, K. ;
Benoit, A. ;
Bernard, J-P. ;
Bersanelli, M. ;
Bhatia, R. ;
Bock, J. J. ;
Bonaldi, A. ;
Bond, J. R. ;
Borrill, J. ;
Bouchet, F. R. ;
Brown, M. L. ;
Bucher, M. ;
Burigana, C. ;
Cabella, P. ;
Cardoso, J-F. ;
Catalano, A. ;
Cayon, L. ;
Challinor, A. ;
Chamballu, A. ;
Chiang, L-Y ;
Chiang, C. ;
Chon, G. ;
Christensen, P. R. ;
Churazov, E. ;
Clements, D. L. ;
Colafrancesco, S. ;
Colombi, S. ;
Couchot, F. ;
Coulais, A. ;
Crill, B. P. ;
Cuttaia, F. ;
Da Silva, A. ;
Dahle, H. ;
Danese, L. ;
Davis, R. J. ;
de Bernardis, P. ;
de Gasperis, G. ;
de Rosa, A. ;
de Zotti, G. .
ASTRONOMY & ASTROPHYSICS, 2011, 536
[2]   Cosmological Parameters from Observations of Galaxy Clusters [J].
Allen, Steven W. ;
Evrard, August E. ;
Mantz, Adam B. .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 49, 2011, 49 :409-470
[3]  
Angulo R. E., 2012, ARXIV12033216
[4]   Resolving cosmic structure formation with the Millennium-II Simulation [J].
Boylan-Kolchin, Michael ;
Springel, Volker ;
White, Simon D. M. ;
Jenkins, Adrian ;
Lemson, Gerard .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 398 (03) :1150-1164
[5]   Profiles of dark haloes: evolution, scatter and environment [J].
Bullock, JS ;
Kolatt, TS ;
Sigad, Y ;
Somerville, RS ;
Kravtsov, AV ;
Klypin, AA ;
Primack, JR ;
Dekel, A .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 321 (03) :559-575
[6]   Constraining dark energy with clusters: Complementarity with other probes [J].
Cunha, Carlos ;
Huterer, Dragan ;
Frieman, Joshua A. .
PHYSICAL REVIEW D, 2009, 80 (06)
[7]   THE EVOLUTION OF LARGE-SCALE STRUCTURE IN A UNIVERSE DOMINATED BY COLD DARK MATTER [J].
DAVIS, M ;
EFSTATHIOU, G ;
FRENK, CS ;
WHITE, SDM .
ASTROPHYSICAL JOURNAL, 1985, 292 (02) :371-394
[8]   GRAVITATIONAL CLUSTERING FROM SCALE-FREE INITIAL CONDITIONS [J].
EFSTATHIOU, G ;
FRENK, CS ;
WHITE, SDM ;
DAVIS, M .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1988, 235 (03) :715-748
[9]   The power spectrum dependence of dark matter halo concentrations [J].
Eke, VR ;
Navarro, JF ;
Steinmetz, M .
ASTROPHYSICAL JOURNAL, 2001, 554 (01) :114-125
[10]   EXPECTATIONS FOR X-RAY-CLUSTER OBSERVATIONS BY THE ROSAT SATELLITE [J].
EVRARD, AE ;
HENRY, JP .
ASTROPHYSICAL JOURNAL, 1991, 383 (01) :95-103