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Date and Time of the Query: 2019-04-26 T07:10:02 PDT
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For refcode 2007MNRAS.379..317H:
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Copyright by Royal Astronomical Society. 2007MNRAS.379..317H A comparison of weak-lensing masses and X-ray properties of galaxy clusters Henk Hoekstra Abstract. We present measurements of the masses of 20 X-ray luminous clusters of galaxies at intermediate redshifts, determined from a weak-lensing analysis of deep archival R-band data obtained using the Canada-France-Hawaii Telescope. Compared to previous work, our analysis accounts for a number of effects that are typically ignored, but can lead to small biases, or incorrect error estimates. We derive masses that are essentially model-independent and find that they agree well with measurements of the velocity dispersion of cluster galaxies and with the results of X-ray studies. Assuming a power law between the lensing mass and the X-ray temperature, M_2500_ is proportional to T^{alpha}^, we find a best-fitting slope of {alpha} = 1.34^+0.30^_-0.28_. This slope agrees with self-similar cluster models and studies based on X-ray data alone. For a cluster with a temperature of kT = 5 keV we obtain a mass M_2500_ = (1.4 +/- 0.2) x 10^14^ h^-1^ M_sun_ in fair agreement with recent Chandra and XMM studies. Key words: gravitational lensing, galaxies: clusters: general, cosmology: observations, dark matter
Retrieve 20 NED objects in this reference.
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