Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9105p&link_type=abstract
American Astronomical Society, AAS Meeting #211, #91.05; Bulletin of the American Astronomical Society, Vol. 39, p.884
Other
1
Scientific paper
Cross correlations between the WMAP full sky K, Ka, Q, V, and W-band maps with the 1.4 GHz NVSS source count map and the HEAO I A2 2-10 keV full sky X-ray flux map are used to constrain rms fluctuations due to unresolved & undetected microwave sources in the WMAP frequency range. In the Q band (40.7 GHz), a lower limit, taking account only of those fluctuations correlated with the 1.4 GHz radio counts and the X-ray flux, corresponds to an rms Rayleigh-Jeans temperature of 2μK for a solid angle of one square degree. The correlated fluctuations at the other bands are consistent with a α = -0.1 ± 0.4 frequency spectrum. Using the rms fluctuations of X-ray flux and radio source flux, and the cross correlation of these two quantities as a guide, the above lower limit leads to a plausible estimate of 5μK for Q-band rms fluctuations in one square degree. This value is similar to that implied by the excess, small angular scale, Q-band fluctuations observed by WMAP, and is consistent with estimates made by extrapolating low-frequency source counts.
Boughn Stephen
Partridge Robert B.
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