Four Measures of the Intracluster Medium Temperature and Their Relation to a Cluster’s Dynamical State

@article{Mathiesen2001FourMO,
  title={Four Measures of the Intracluster Medium Temperature and Their Relation to a Cluster’s Dynamical State},
  author={Benjamin Francis Mathiesen and August E. Evrard},
  journal={The Astrophysical Journal},
  year={2001},
  volume={546},
  pages={100-116}
}
We employ an ensemble of 24 hydrodynamic cluster simulations to create spatially and spectrally resolved images of quality comparable to Chandra's expected performance. Emission from simulation mass elements is represented using the XSPEC "MEKAL" program assuming 0.3 solar metallicity and the resulting spectra are fitted with a single-temperature model. Despite significant departures from isothermality in the cluster gas, single-temperature models produce acceptable fits to 20,000 source photon… Expand
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References

SHOWING 1-10 OF 34 REFERENCES
Properties of the intracluster medium in an ensemble of nearby galaxy clusters
We present a systematic analysis of the intracluster medium (ICM) in an X-ray flux limited sample of 45 galaxy clusters. Using archival ROSAT Position-Sensitive Proportional Counter (PSPC) data andExpand
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
The effects of clumping and substructure on intracluster medium mass measurements
We examine an ensemble of 48 simulated clusters to determine the effects of small-scale density fluctuations and large-scale substructure on X-ray measurements of the intracluster medium (ICM) mass.Expand
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 wereExpand
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’,Expand
A catalog of intracluster gas temperatures
We have searched the Einstein Monitor Proportional Counter (MPC) data base for observations of clusters of galaxies. By coadding the MPC spectra obtained during all pointed observations of clustersExpand
Statistical Properties of X-Ray Clusters: Analytic and Numerical Comparisons
We compare the results of Eulerian hydrodynamic simulations of cluster formation against virial scaling relations between four bulk quantities: the cluster mass, the dark matter velocity dispersion,Expand
The LX-T Relation and Temperature Function for Nearby Clusters Revisited
The X-ray luminosity-temperature relation for nearby T 3.5-10 keV clusters is rederived using new ASCA temperatures and ROSAT luminosities. Both quantities are derived by directly excluding theExpand
Mass estimates of X-ray clusters
We use cosmological gasdynamic simulations to investigate the accuracy of galaxy cluster mass estimates based on X-ray observations. The experiments follow the formation of clusters in differentExpand
AN X-RAY SIZE-TEMPERATURE RELATION FOR GALAXY CLUSTERS: OBSERVATION AND SIMULATION
We show that galaxy clusters conform to a tight relation between X-ray isophotal size RI and emission-weighted intracluster medium (ICM) temperature TX. The best-fit relation for 41 members of anExpand
...
1
2
3
4
...