AAS 197, January 2001
Session 104. The Cosmic Distance Scale
Display, Thursday, January 11, 2001, 9:30-4:00pm, Exhibit Hall

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[104.01] Observations of the Sunyaev-Zel'dovich Effect with the Cosmic Background Imager

P. S. Udomprasert, B. S. Mason, A. C. S. Readhead (Caltech)

We are engaged in a program with the Cosmic Background Imager (CBI), a 13-element interferometer recently installed at 5000 m in the Chilean Andes, to measure H0 with 10% accuracy through observations of the Sunyaev-Zel'dovich effect (SZE) in a sample of low-redshift clusters (z<0.1). Our focus on nearby objects allows us to study a well-defined, orientation unbiased sample, minimizing systematic errors due to cluster elongation. The large angular extent of our targets will also provide us with a better understanding of the effects of non-smooth and non-isothermal cluster gas on the H0 derivation. We present early results from our sample. We gratefully acknowledge support from NSF award AST-9802989, and PSU acknowledges support from an NSF Graduate Student Fellowship.

The author(s) of this abstract have provided an email address for comments about the abstract: psu@astro.caltech.edu

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