ARCADE Measurement and Interpretation of the Extragalactic Background at 3 GHz

Details ARCADE Measurement and Interpretation of the Extragalactic Background at 3 GHz ARCADE Measurement and Interpretation of the Extragalactic Background at 3 GHz

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347438s&link_type=abstract

American Astronomical Society, AAS Meeting #213, #474.38; Bulletin of the American Astronomical Society, Vol. 41, p.434

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Scientific paper

We use absolutely calibrated data at 3, 8, and 10 GHz from the 2006 flight of the ARCADE instrument, along with previous ground-based radio surveys at lower frequencies to constrain models of extragalactic emission. Such emission is a combination of the Cosmic Microwave Background (CMB) monopole, the integrated contribution of radio emission from external galaxies, any spectral distortions present in the CMB, and any other extragalactic source. After removal of estimates of foreground emission from our own galaxy, we present fits to a combination of the flat-spectrum CMB, a synchrotron power-law model of the contribution from external galaxies, and spectral distortions in the CMB. We find that the total extragalactic signal at 3 GHz is larger than can be explained from the CMB plus the integrated radio emission from galaxies estimated from existing surveys.

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