The Birmingham-CfA cluster scaling project - III. Entropy and similarity in galaxy systems

@article{Ponman2003TheBC,
  title={The Birmingham-CfA cluster scaling project - III. Entropy and similarity in galaxy systems},
  author={Trevor J. Ponman and Alastair J. R. Sanderson and Alexis Finoguenov},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2003},
  volume={343},
  pages={331-342}
}
We examine profiles and scaling properties of the entropy of the intergalactic gas in a sample of 66 virialized systems, ranging in mass from single elliptical galaxies to rich clusters, for which we have resolved X-ray temperature profiles. Some of the properties we derive appear to be inconsistent with any of the models put forward to explain the breaking of self-similarity in the baryon content of clusters. In particular, the entropy profiles, scaled to the virial radius, are broadly similar… 

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References

SHOWING 1-10 OF 56 REFERENCES
The entropy and energy of intergalactic gas in galaxy clusters
Studies of the X-ray surface brightness profiles of clusters, coupled with theoretical considerations, suggest that the breaking of self-similarity in the hot gas results from an ‘entropy floor’,
The Birmingham-CfA cluster scaling Project – I. Gas fraction and the M-Tx relation
We have assembled a large sample of virialized systems, comprising 66 galaxy clusters, groups and elliptical galaxies with high-quality X-ray data. To each system we have fitted analytical profiles
Physical Implications of the X-ray Properties of Galaxy Groups and Clusters
Within the standard framework of structure formation, where clusters and groups of galaxies are built up from the merging of smaller systems, the physical properties of the intracluster medium, such
Heating of Intergalactic Gas and Cluster Scaling Relations
X-ray observations of galaxy groups and clusters are inconsistent with the predictions of the simplest hierarchical clustering models, wherein nonbaryonic and baryonic components are assembled
Temperature and Heavy-Element Abundance Profiles of Cool Clusters of Galaxies from ASCA
We perform a spatially resolved X-ray spectroscopic study of a set of 18 relaxed clusters of galaxies with gas temperatures below 4 keV. Spectral analysis was done using ASCA/SIS data coupled with
Competition between shocks and entropy floor: Unifying groups and clusters of galaxies
Semi-analytic models of X-ray clusters and groups of galaxies, relying on the idea that there was a non-gravitational energy injection in these systems, are able to reproduce many observed
The Luminosity-Temperature Relation for Groups and Clusters of Galaxies
We model the effects of shocks on the diffuse, X-ray-emitting baryons in clusters of galaxies. Shocks separate the infalling from the inner gas nearly at equilibrium and dominate the compression and
Evolution of Clusters of Galaxies
In hierarchical models for structure formation like CDM, the mass scale of clustering evolves rapidly and clusters in the past are predicted to be less massive, but denser and more numerous. The
Simulations of X-ray clusters
We present simulations of the formation and evolution of galaxy clusters in the Cold Dark Matter cosmogony. Clusters with a wide range of mass were selected from previous N-body models, and were
Explaining the Entropy Excess in Clusters and Groups of Galaxies without Additional Heating
The X-ray luminosity and temperature of clusters and groups of galaxies do not scale in a self-similar manner. This has often been interpreted as a sign that the intracluster medium has been
...
1
2
3
4
5
...