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- W2080261242 abstract "The X-ray cluster gas density distribution in hydrostatic equilibrium is computed from the universal density profile of the dark matter halo proposed by Navarro, Frenk, & White in two recent studies. If one assumes the isothermality, the resulting distribution is well approximated by the conventional β-model. We predict the core radius rc, the β-parameter, and the X-ray luminosity of clusters as a function of the temperature TX of clusters in some representative cosmological models and compare them with observations and results of numerical simulations. The predicted size of rc is a factor of 3-10 smaller than the average of observed values. If both the universal density profile and the hydrostatic equilibrium are reasonable approximation to the truth, then this suggests either that the previous X-ray observations systematically overestimated the core radius of gas densities in clusters of galaxies or that some important physical mechanisms, which significantly increase the core radius, are still missing." @default.
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- W2080261242 date "1998-04-20" @default.
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- W2080261242 title "X‐Ray Gas Density Profile of Clusters of Galaxies from the Universal Dark Matter Halo" @default.
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- W2080261242 doi "https://doi.org/10.1086/305507" @default.
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