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.

de Bernardis, P., Ade, P., Bock, J., Bond, J., Borrill, J., Boscaleri, A., et al. (2001). First results from the BOOMERanG experiment. In Cosmology and Particle Physics (pp.85-94) [10.1063/1.1363510].

First results from the BOOMERanG experiment

DE GASPERIS, GIANCARLO;DE TROIA, GRAZIA;VITTORIO, NICOLA
2001-01-01

Abstract

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.
Cosmology and Particle Physics: CAPP 2000
2000
Rilevanza internazionale
su invito
2001
Settore FIS/05 - ASTRONOMIA E ASTROFISICA
English
Background radiations, Observational cosmology, Radio, microwave
Intervento a convegno
de Bernardis, P., Ade, P., Bock, J., Bond, J., Borrill, J., Boscaleri, A., et al. (2001). First results from the BOOMERanG experiment. In Cosmology and Particle Physics (pp.85-94) [10.1063/1.1363510].
de Bernardis, P; Ade, P; Bock, J; Bond, J; Borrill, J; Boscaleri, A; Coble, K; Crill, B; DE GASPERIS, G; DE TROIA, G; Farese, P; Ferreira, P; Ganga, K...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/66835
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