1996/11/26 by Richard Saunders, Saunders, Richard · 1 citation
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Gamma-ray bursts and supernovae #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9611213
5 pages, LaTex, uses 'cmb.sty' (included), 1 PostScript figure. To appear in proceedings of the XXXIst Rencontre de Moriond, `Microwave Background Anisotropies'
arxiv created 1996/11/26 · openalex publication_date 1996/11/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Ryle Telescope has been used to provide images at 15 GHz of the Sunyaev-Zel'dovich decrements towards a dozen clusters in an X-ray luminosity-limited sample. So far, X-ray data have allowed H0 estimates towards two of these, both giving ``low'' values that are self-consistent, though it is essential to obtain many more estimates to reduce the effects of cluster projection. We have also discovered a decrement towards the z=3.8 quasar pair PC1643+4631A&B (198'' separation); substantial X-ray, optical and infrared follow-up show that the cluster responsible is either at z>1 or very underluminous and that very significant gravitational lensing must be occuring.