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Date and Time of the Query: 2019-04-20 T13:18:38 PDT
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For refcode 2001MNRAS.328L..37A:
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NED Abstract

Copyright by Royal Astronomical Society. 2001MNRAS.328L..37A The X-ray virial relations for relaxed lensing clusters observed with Chandra S.W. Allen, R.W. Schmidt and A.C. Fabian ABSTRACT We examine the relations linking mass, X-ray temperature and bolometric luminosity for a sample of luminous, relatively relaxed clusters of galaxies observed with the Chandra Observatory, for which independent confirmation of the mass results is available from gravitational lensing studies. Within radii corresponding to a fixed overdensity {DELTA} = 2500 with respect to the critical density at the redshifts of the clusters, the observed temperature profiles, scaled in units of T_2500_ and r_2500_, exhibit an approximately universal form which rises within r ~ 0.3r_2500_ and then remains approximately constant out to r_2500_. We obtain best-fitting slopes for the mass-temperature and temperature-luminosity relations consistent with the predictions from simple scaling arguments i.e. M_2500_ is proportional to T_2500_^3/2^ and L_2500_ is proportional to T_2500_^2^, respectively. We confirm the presence of a systematic offset of ~40 per cent between the normalizations of the observed and predicted mass-temperature relations for both SCDM and {LAMBDA}CDM cosmologies. Keywords: gravitational lensing - galaxies: clusters: general - cosmological parameters - X-rays: galaxies: clusters.
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