Scaling Relation in Two Situations of Extreme Mergers

@article{Rasia2011ScalingRI,
  title={Scaling Relation in Two Situations of Extreme Mergers},
  author={Elena Rasia and Pasquale Mazzotta and August E. Evrard and Maxim Markevitch and Klaus Dolag and Massimo Meneghetti},
  journal={The Astrophysical Journal},
  year={2011},
  volume={729},
  pages={45-45}
}
Clusters of galaxies are known to be dynamically active systems, yet X-ray studies of the low-redshift population exhibit tight scaling laws. In this work, we extend previous studies of this apparent paradox using numerical simulations of two extreme merger cases, one is a high Mach number (above 2.5) satellite merger similar to the "bullet cluster" and the other is a merger of nearly equal-mass progenitors. Creating X-ray images densely sampled in time, we construct TX, Mgas, and YX measures… Expand

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References

SHOWING 1-10 OF 56 REFERENCES
The LX—T relation and intracluster gas fractions of X-ray clusters
We re-examine the X-ray luminosity–temperature relation using a nearly homogeneous data set of 24 clusters selected for statistically accurate temperature measurements and absence of strong coolingExpand
Effects of Mergers and Core Structure on the Bulk Properties of Nearby Galaxy Clusters
We use X-ray morphological measurements and the scatter of clusters about observed and simulated scaling relations to examine the impact of merging and core-related phenomena on the structure ofExpand
The evolution of galaxy cluster X-ray scaling relations
We use numerical simulations to investigate, for the first time, the joint effect of feedback from supernovae (SNe) and active galactic nuclei (AGN) on the evolution of galaxy cluster X-ray scalingExpand
Off-Axis Cluster Mergers: Effects of a Strongly Peaked Dark Matter Profile
We present a parameter study of offset mergers between clusters of galaxies. Using the Eulerian hydrodynamics/N-body code COSMOS, we simulate mergers between nonisothermal, hydrostatic clusters withExpand
The impact of mergers on relaxed x-ray clusters II: effects on global X-ray and Sunyaev-Zel'dovich properties and their scaling relations
We use the suite of simulations presented by Poole et al. to examine global X-ray and Sunyaev-Zel'dovich (SZ) observables for systems of merging relaxed X-ray clusters. The time evolution of ourExpand
Gas entropy in a representative sample of nearby X-ray galaxy clusters (REXCESS): relationship to gas mass fraction
We examine the radial entropy distribution and its scaling using 31 nearby galaxy clusters from the Representative XMM-Newton Cluster Structure Survey (REXCESS), a sample in the temperature range 2-9Expand
The merger history of clusters and its effect on the X-ray properties of the intracluster medium
We investigate the growth over time of 20 massive (>3 keV) clusters in a hydrodynamical simulation of the Λ cold dark matter cosmology with radiative cooling. The clusters show a variety of formationExpand
THE INFLUENCE OF CONCENTRATION AND DYNAMICAL STATE ON SCATTER IN THE GALAXY CLUSTER MASS-TEMPERATURE RELATION
Using a hydrodynamics plus N-body simulation of galaxy cluster formation within a large volume and mock Chandra X-ray observations, we study the form and evolution of the intrinsic scatter about theExpand
Testing X-ray Measurements of Galaxy Clusters with Cosmological Simulations
X-ray observations of galaxy clusters potentially provide powerful cosmological probes if systematics due to our incomplete knowledge of the ICM physics is understood and controlled. In this paper weExpand
Galaxy cluster X-ray luminosity scaling relations from a representative local sample (REXCESS)
We examine the X-ray luminosity scaling relations of 31 nearby galaxy clusters from the Representative XMM-Newton Cluster Structure Survey (REXCESS). The objects are selected only in X-rayExpand
...
1
2
3
4
5
...