English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a determination by the Archeops experiment of the angular powerspectrum of the cosmic microwave background anisotropy in 16 bins over themultipole range l=15-350. Archeops was conceived as a precursor of the PlanckHFI instrument by using the same optical design and the same technology for thedetectors and their cooling. Archeops is a balloon-borne instrument consistingof a 1.5 m aperture diameter telescope and an array of 21 photometersmaintained at ~100 mK that are operating in 4 frequency bands centered at 143,217, 353 and 545 GHz. The data were taken during the Arctic night of February7, 2002 after the instrument was launched by CNES from Esrange base (Sweden).The entire data cover ~ 30% of the sky.This first analysis was obtained with asmall subset of the dataset using the most sensitive photometer in each CMBband (143 and 217 GHz) and 12.6% of the sky at galactic latitudes above 30degrees where the foreground contamination is measured to be negligible. Thelarge sky coverage and medium resolution (better than 15 arcminutes) providefor the first time a high signal-to-noise ratio determination of the powerspectrum over angular scales that include both the first acoustic peak andscales probed by COBE/DMR. With a binning of Delta(l)=7 to 25 the error barsare dominated by sample variance for l below 200. A companion paper details thecosmological implications.

The cosmic microwave background anisotropy power spectrum measured by Archeops