Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 459, Issue 3, Pages 2973-2991Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw800
Keywords
methods: numerical; galaxies: haloes; cosmology: theory; dark matter
Categories
Funding
- Instituto de Fisica Teorica (IFT-UAM/CSIC in Madrid) via the Centro de Excelencia Severo Ochoa Program [SEV-2012-0249]
- University of Western Australia Research Collaboration Award
- ARC Centre of Excellence for All Sky Astrophysics (CAASTRO) [CE110001020]
- ARC [DP130100117, DP140100198]
- MINECO (Spain) [AYA 2012-31101]
- Ministerio de Economia y Competitividad (MINECO) in Spain [AYA2012-31101]
- Consolider-Ingenio Programme of the Spanish Ministerio de Ciencia e Innovacion (MICINN) [MultiDark CSD2009-00064]
- Australian Research Council (ARC) [DP130100117, DP140100198, FT130100041]
- Kavli Foundation
- ERC
- STFC [ST/L000768/1]
- NSERC
- Canada Research Chairs programme
- CFI-NSRIT
- PRIN-MIUR - Italian Minister of University and Research
- PRIN-INAF
- INFN INDARK Grant
- 'Consorzio per la Fisica di Trieste'
- STFC Advanced Fellowship
- NSF [AST-1009811]
- NASA [ATP NNX11AE07G]
- NASA Chandra [GO213004B, TM4-15007X]
- Research Corporation
- SSimPL program
- Sydney Institute for Astronomy (SIfA) [DP130100117]
- SNF [PP00P2 128540/1]
- Spanish Ministry of Economy and Competitiveness (MINECO) through the Severo Ochoa Program [MINECO SEV-2011-0187, AYA2013-46886-P]
- DFG Research Unit 1254 'Magnetisation of Interstellar and Intergalactic Media'
- DFG Cluster of Excellence 'Origin and Structure of the Universe'
- Jim Buckee Fellowship
- STFCs DiRAC initiative
- European Research Council under the European Union's Seventh Framework Programme (FP7)/ERC [278594-GasAroundGalaxies]
- Science and Technology Facilities Council [ST/M000966/1, ST/K000373/1, ST/P002307/1, ST/P002315/1, ST/M007073/1, ST/M006948/1, ST/L000768/1] Funding Source: researchfish
- STFC [ST/P002307/1, ST/L000695/1, ST/I004459/1, ST/M006948/1, ST/M007073/1, ST/I004459/2, ST/P002315/1, ST/L000768/1, ST/K000373/1] Funding Source: UKRI
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We have simulated the formation of a massive galaxy cluster (M-200(crit) = 1.1 x 10(15) h(-1) M-circle dot) in a Lambda cold dark matter universe using 10 different codes (RAMSES, 2 incarnations of AREPO and 7 of GADGET), modelling hydrodynamics with full radiative subgrid physics. These codes include smoothed-particle hydrodynamics (SPH), spanning traditional and advanced SPH schemes, adaptive mesh and moving mesh codes. Our goal is to study the consistency between simulated clusters modelled with different radiative physical implementations - such as cooling, star formation and thermal active galactic nucleus (AGN) feedback. We compare images of the cluster at z = 0, global properties such as mass, and radial profiles of various dynamical and thermodynamical quantities. We find that, with respect to non-radiative simulations, dark matter is more centrally concentrated, the extent not simply depending on the presence/absence of AGN feedback. The scatter in global quantities is substantially higher than for non-radiative runs. Intriguingly, adding radiative physics seems to have washed away the marked code-based differences present in the entropy profile seen for non-radiative simulations in Sembolini et al.: radiative physics + classic SPH can produce entropy cores, at least in the case of non cool-core clusters. Furthermore, the inclusion/absence of AGN feedback is not the dividing line - as in the case of describing the stellar content - for whether a code produces an unrealistic temperature inversion and a falling central entropy profile. However, AGN feedback does strongly affect the overall stellar distribution, limiting the effect of overcooling and reducing sensibly the stellar fraction.
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