First results from the CBI
作者:
B. S. Mason,
T. J. Pearson,
A. C. S. Readhead,
M. Shepherd,
J. Sievers,
P. Udomprasert,
J. K. Cartwright,
S. Padin,
期刊:
AIP Conference Proceedings
(AIP Available online 1901)
卷期:
Volume 586,
issue 1
页码: 178-183
ISSN:0094-243X
年代: 1901
DOI:10.1063/1.1419550
出版商: AIP
数据来源: AIP
摘要:
The Cosmic Background Imager (CBI) is an instrument designed to measure intrinsic anisotropies in the cosmic microwave background (CMB) on angular scales from about 3 arc minutes to one degree (spherical harmonics ofl∼4250tol∼400). The CBI is a 13 element interferometer mounted on a 6 meter platform operating in ten 1-GHz frequency bands from 26 to 36 GHz. We present a review of the capabilities of the instrument and a discussion of observations which have been taken over the past year from the Atacama desert of Chile. We also present first results from the CBI which show a strong cutoff in the power spectrum betweenl=600andl=1200which is consistent with the photon-diffusive damping predicted by most models of structure formation in the early universe. We discuss future topics which the CBI will address. ©2001 American Institute of Physics.
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