SIMBAD references

2007MNRAS.379..317H - Mon. Not. R. Astron. Soc., 379, 317-330 (2007/July-3)

A comparison of weak-lensing masses and X-ray properties of galaxy clusters.

HOEKSTRA H.

Abstract (from CDS):

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, M2500Tα, we find a best-fitting slope of α = 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 M2500= (1.4±0.2)x1014h–1M in fair agreement with recent Chandra and XMM studies.

Abstract Copyright: 2007 The Author. Journal compilation © 2007 RAS

Journal keyword(s): gravitational lensing - galaxies: clusters: general - cosmology: observations - dark matter

Status at CDS:  

Simbad objects: 21

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2020.04.07-19:33:09

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