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First results from the BOOMERanG experiment

de Bernardis, P., Ade, Peter A. R., Bock, J. J., Bond, J. R., Borrill, J., Boscaleri, A., Coble, K., Crill, B. P., de Gasperis, G., De Troia, G., Farese, P. C., Ferreira, P. G., Ganga, K., Giacometti, M., Hivon, E., Hristov, V. V., Iacoangeli, A., Jaffe, A. H., Lange, A. E., Martinis, L., Masi, S., Mason, P., Mauskopf, Philip Daniel, Melchiorri, A., Miglio, L., Montroy, T., Netterfield, C. B., Pascale, Enzo, Piacentini, F., Pogosyan, D., Pongetti, F., Prunet, S., Rao, S., Romeo, G., Ruhl, J. E., Scaramuzzi, F., Sforna, D. and Vittorio, N. 2001. First results from the BOOMERanG experiment. Presented at: Cosmology and particle physics : CAPP 2000. AIP Conference, Verbier, Switzerland, 17-28 July 2000. Published in: Durrer, Ruth, Garcia-Bellido, Juan and Shaposhnikov, Mikhail eds. Cosmology and particle physics : CAPP 2000 : Verbier, Switzerland, 17-28 July 2000 (Proceedings). AIP conference proceedings , vol. 555. Melville, NY: American Institute of Physics, pp. 85-94. 10.1063/1.1363510

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We report the first results from the BOOMERanG experiment, which mapped at 90, 150, 240 and 410 GHz a wide (3%) region of the microwave sky with minimal local contamination. From the data of the best 150 GHz detector we find evidence for a well defined peak in the power spectrum of temperature fluctuations of the Cosmic Microwave Background, localized at =197+/-6, with an amplitude of (68+/-8)μKCMB. The location, width and amplitude of the peak is suggestive of acoustic oscillations in the primeval plasma. In the framework of inflationary adiabatic cosmological models the measured spectrum allows a Bayesian estimate of the curvature of the Universe and of other cosmological parameters. With reasonable priors we find Ω=(1.07+/-0.06) and ns=(1.00+/-0.08) (68%C.L.) in excellent agreement with the expectations from the simplest inflationary theories. We also discuss the limits on the density of baryons, of cold dark matter and on the cosmological constant.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: American Institute of Physics
ISBN: 1563969866
ISSN: 0094-243X
Last Modified: 16 Mar 2020 14:16

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