TY - JOUR
T1 - Galactic microwave emission at degree angular scales
AU - De Oliveira-Costa, Angélica
AU - Kogut, A.
AU - Deviln, Mark J.
AU - Barth Netterfield, C.
AU - Page, Lyman A.
AU - Wollack, Edward J.
N1 - Funding Information:
We would like to thank Norman C. Jarosik, Max Tegmark, and David T. Wilkinson for many useful comments on the manuscript. Support for this work was provided by a David and Lucile Packard Foundation Fellowship. We acknowledge the NASA office of Space Sciences, the COBE flight team, and all those who helped process and analyze the DIRBE data.
PY - 1997
Y1 - 1997
N2 - We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave background (CMB) data with different maps to quantify possible foreground contamination. We detect a marginal correlation (≳2 σ) with the Diffuse Infrared Background Experiment (DIRBE) 240, 140, and 100 μm maps, but we find no significant correlation with point sources, with the Haslam 408 MHz map, or with the Reich and Reich 1420 MHz map. The rms amplitude of the component correlated with DIRBE is about 20% of the CMB signal. Interpreting this component as free-free emission, this normalization agrees with that of the 1996 works of Kogut et al. and supports the hypothesis that the spatial correlation between dust and warm ionized gas observed on large angular scales persists to smaller angular scales. Subtracting this contribution from the CMB data reduces the normalization of the Saskatoon power spectrum by only a few percent.
AB - We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave background (CMB) data with different maps to quantify possible foreground contamination. We detect a marginal correlation (≳2 σ) with the Diffuse Infrared Background Experiment (DIRBE) 240, 140, and 100 μm maps, but we find no significant correlation with point sources, with the Haslam 408 MHz map, or with the Reich and Reich 1420 MHz map. The rms amplitude of the component correlated with DIRBE is about 20% of the CMB signal. Interpreting this component as free-free emission, this normalization agrees with that of the 1996 works of Kogut et al. and supports the hypothesis that the spatial correlation between dust and warm ionized gas observed on large angular scales persists to smaller angular scales. Subtracting this contribution from the CMB data reduces the normalization of the Saskatoon power spectrum by only a few percent.
KW - Cosmic microwave background
KW - Methods: data analysis
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U2 - 10.1086/310684
DO - 10.1086/310684
M3 - Article
AN - SCOPUS:21744455808
VL - 482
SP - L17-L20
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1 PART II
ER -