The Concentration-Mass relation of massive, dynamically relaxed galaxy clusters: agreement between observations and ΛCDM simulations
The relationship linking a galaxy cluster’s total mass with the concentration of its mass profile and its redshift is a fundamental prediction of the Cold Dark Matter (CDM) paradigm of cosmic structure formation. However, confronting those predictions with observations is complicated by the fact tha...
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| Hauptverfasser: | , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
May 2023
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2023, Jahrgang: 521, Heft: 1, Pages: 790-799 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stad585 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stad585
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| Verfasserangaben: | Elise Darragh-Ford, Adam B. Mantz, Elena Rasia, Steven W. Allen, R. Glenn Morris, Jack Foster, Robert W. Schmidt and Guillermo Wenrich |
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| 245 | 1 | 4 | |a The Concentration-Mass relation of massive, dynamically relaxed galaxy clusters |b agreement between observations and ΛCDM simulations |c Elise Darragh-Ford, Adam B. Mantz, Elena Rasia, Steven W. Allen, R. Glenn Morris, Jack Foster, Robert W. Schmidt and Guillermo Wenrich |
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| 520 | |a The relationship linking a galaxy cluster’s total mass with the concentration of its mass profile and its redshift is a fundamental prediction of the Cold Dark Matter (CDM) paradigm of cosmic structure formation. However, confronting those predictions with observations is complicated by the fact that simulated clusters are not representative of observed samples where detailed mass profile constraints are possible. In this work, we calculate the symmetry-peakiness-alignment (SPA) morphology metrics for maps of X-ray emissivity from the three hundred project hydrodynamical simulations of galaxy clusters at four redshifts, and thereby select a sample of morphologically relaxed, simulated clusters, using observational criteria. These clusters have on average earlier formation times than the full sample, confirming that they are both morphologically and dynamically more relaxed than typical. We constrain the concentration-mass-redshift relation of both the relaxed and complete sample of simulated clusters, assuming power-law dependences on mass (κm) and 1 + z (κζ), finding κm = −0.12 ± 0.07 and κζ = −0.27 ± 0.19 for the relaxed subsample. From an equivalently selected sample of massive, relaxed clusters observed with Chandra, we find κm = −0.12 ± 0.08 and κζ = −0.48 ± 0.19, in good agreement with the simulation predictions. The simulated and observed samples also agree well on the average concentration at a pivot mass and redshift providing further validation of the ΛCDM paradigm in the properties of the largest gravitationally collapsed structures observed. This also represents the first clear detection of decreasing concentration with redshift, a longstanding prediction of simulations in data. | ||
| 700 | 1 | |a Mantz, Adam B. |e VerfasserIn |0 (DE-588)1211572374 |0 (DE-627)1699980837 |4 aut | |
| 700 | 1 | |a Rasia, Elena |e VerfasserIn |0 (DE-588)1160637792 |0 (DE-627)102405926X |0 (DE-576)506105024 |4 aut | |
| 700 | 1 | |a Allen, Steven W. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Morris, R Glenn |e VerfasserIn |4 aut | |
| 700 | 1 | |a Foster, Jack |e VerfasserIn |4 aut | |
| 700 | 1 | |a Schmidt, Robert W. |d 1972- |e VerfasserIn |0 (DE-588)122277511 |0 (DE-627)081846029 |0 (DE-576)293190879 |4 aut | |
| 700 | 1 | |a Wenrich, Guillermo |e VerfasserIn |4 aut | |
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