X-ray temperature distribution function of clusters in presence of large non-radial motionsReport as inadecuate



 X-ray temperature distribution function of clusters in presence of large non-radial motions


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We consider the non-radial motions, originating in the outskirts of clusters of galaxies and we show how it may reduce the discrepancy between Cold Dark Matter CDM predicted X-ray temperature distribution function of clusters of galaxies and that really observed, so resolving the problem of the X-ray clusters abundance over-production predicted by the CDM model. We construct the X-ray temperature distribution function using Press-Schechters 1974 theory and Evrards 1990 prescriptions for the mass-temperature relation, taking also account of the non-radial motions originating from the gravitational interaction of the quadrupole moment of the protocluster. Then, we compare our X-ray temperature distribution function with the tidal field of the matter of the neighboring protostructures. We find that the model produces a reasonable cluster temperature distribution.



Author: A. Del Popolo; M. Gambera

Source: https://archive.org/







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