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First results from the arcminute cosmology bolometer array receiver

Runyan, M. C., Ade, Peter A. R., Bock, J. J., Bond, J. R., Cantalupo, C., Contaldi, C. R., Daub, M. D., Goldstein, J. H., Gomez, P. L., Holzapfel, W. L., Kuo, C. L., Lange, A. E., Lueker, M., Newcomb, M., Peterson, J. B., Pogosyan, D., Romer, A. K., Ruhl, J., Torbet, E. and Woolsey, D. 2003. First results from the arcminute cosmology bolometer array receiver. New Astronomy Reviews 47 (11-12) , pp. 915-923. 10.1016/j.newar.2003.09.001

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We review the first science results from the Arcminute Cosmology Bolometer Array Receiver (ACBAR); a multi-frequency millimeter-wave receiver optimized for observations of the Cosmic Microwave Background (CMB) and the Sunyaev–Zel’dovich (SZ) effect in clusters of galaxies. ACBAR was installed on the 2 m Viper telescope at the South Pole in January 2001 and the results presented here incorporate data through July 2002. We present the power spectrum of the CMB at 150 GHz over the range ℓ=150–3000 measured by ACBAR as well as estimates for the values of the cosmological parameters within the context of ΛCDM models. We find that the inclusion of View the MathML source greatly improves the fit to the power spectrum. We also observe a slight excess of small-scale anisotropy at 150 GHz; if interpreted as power from the SZ effect of unresolved clusters, the measured signal is consistent with CBI and BIMA within the context of the SZ power spectrum models tested.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Cosmic microwave background – instrumentation; Observations
Publisher: Elsevier
ISSN: 1387-6473
Last Modified: 04 Jun 2017 04:38

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