Proceedings of the Particle Physics and Early Universe Conference (PPEUC).
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5 Conclusions  

We can conclude that the cluster CL 0016+16 provides an estimate for the Hubble constant of where the errors include systematic and random components only, and where a further orientation-dependent error of about is likely from the unknown three-dimensional structure of the cluster. The ensemble average Hubble constant, based on the SZ effect Hubble diagram to date, is , where the error takes some account of the uncertain systematic effects associated with orientation bias and calibration uncertainties in the data.

Much better-controlled cluster samples, and better-calibrated X-ray and SZ effect data are needed to reduce the error on further. Further clusters at are needed if this technique is to constrain .


PPEUC Proceedings
Thu Jun 19 14:07:57 BST 1997