A Measurement of the Angular Power Spectrum of the Cmb From
نویسنده
چکیده
We report on a measurement of the angular spectrum of the CMB between l ≈ 100 and l ≈ 400 made at 144 GHz from Cerro Toco in the Chilean altiplano. When the new data are combined with previous data at 30 and 40 GHz, taken with the same instrument observing the same section of sky, we find: 1) a rise in the angular spectrum to a maximum with δTl ≈ 85 μK at l ≈ 200 and a fall at l > 300, thereby localizing the peak near l ≈ 200; and 2) that the anisotropy at l ≈ 200 has the spectrum of the CMB. Subject headings: cosmic microwave background — cosmology: observations
منابع مشابه
Squared temperature-temperature power spectrum as a probe of the CMB bispectrum
It is now well known that mode-coupling effects associated with certain secondary effects generate higher order correlations in cosmic microwave background ~CMB! temperature anisotropies, beyond the two-point function. In order to extract such a non-Gaussian signal at the three-point level, we suggest a two-point statistic in the form of an angular power spectrum involving correlations between ...
متن کاملArcheops, Mapping the Cmb Sky from Large to Small Angular Scales
Archeops is a balloon-borne experiment designed to measure the temperature fluctuations of the CMB on a large region of the sky (≃ 30%) with a high angular resolution (10 arcminutes) and a high sensitivity (60µK per pixel). Archeops will perform a measurement of the CMB anisotropies power spectrum from large angular scales (ℓ ≃ 30) to small angular scales (ℓ ≃ 800). Archeops flew for the first ...
متن کاملDasi First Results: a Measurement of the Cosmic Microwave Background Angular Power Spectrum
We present measurements of anisotropy in the Cosmic Microwave Background (CMB) from the first season of observations with the Degree Angular Scale Interferometer (DASI). The instrument was deployed at the South Pole in the austral summer 1999–2000, and made observations throughout the following austral winter. We present a measurement of the CMB angular power spectrum in the range 100 < l < 900...
متن کاملA Blind Estimation of the Power Spectrum of Cmb Anisotropy from Wmap
The angular power spectrum of Cosmic Microwave Background (CMB) radiation has proved to be an excellent observation to measure different cosmological parameters. In order to extract cosmological parameters precisely we need to remove foreground contamination as well as detector noise bias. In this paper we present a framework to extract CMB angular power spectrum from the multi-frequency observ...
متن کاملCalculating CR-39 Response to Radon in Water Using Monte Carlo Simulation
Introduction CR-39 detectors are widely used for Radon and progeny measurement in the air. In this paper, using the Monte Carlo simulation, the possibility of using the CR-39 for direct measurement of Radon and progeny in water is investigated. Materials and Methods Assuming the random position and angle of alpha particle emitted by Radon and progeny, alpha energy and angular spectrum that arri...
متن کامل