Using the Archeops and WMAP data we perform a study of the anti-center Galactic diffuse emissions – thermal dust , synchrotron , free-free and anomalous emission – at degree scales .
The high frequency data are used to infer the thermal dust electromagnetic spectrum and spatial distribution allowing us to precisely subtract this component at lower frequencies .
After subtraction of the thermal dust component a mixture of standard synchrotron and free-free emissions does not account for the residuals at these low frequencies .
Including the all-sky 408 MHz Haslam data we find evidences for anomalous emission with a spectral index of -2.5 in T _ { RJ } units .
However , we are not able to conclude regarding the nature of this anomalous emission in this region .
For the purpose , data between 408 MHz and 20 GHz covering the same sky region are needed .

SM : general – ISM : clouds – Methods : data analysis – Cosmology : observations – Submillimeter – Catalogs

August 26 , 2020