Anomalous Microwave Emission, another CMB low-frequency foreground: spatial variations along the Galactic Plane

Fernández-Torreiro, Mateo ; Rubiño-Martín, José Alberto ; López-Caraballo, Carlos Hugo ; Génova-Santos, Ricardo Tanausú


Intensity foregrounds in the microwave domain are specially complex to model, mostly due to the overlapping of synchrotron and free-free emissions. Besides, anomalous microwave emission (AME) begins to be important for frequencies higher than 10\,GHz. That is why having as many data as possible covering this spectral region is needed. In this talk, we will present how the addition of novel QUIJOTE-MFI data between 10 and 20\,GHz allows to better constrain the diffuse foreground components (mainly synchrotron, free-free and AME) at large angular scales ($\sim0.9^\degr$) along the Galactic Plane ($|b|<10^\degr$). Together with QUIJOTE-MFI, we will be using ancillary low and high frequency data to build spectral energy distributions between 0.408 and 3000\,GHz. We will discuss how the parameters describing the AME (especially its peak emission frequency) vary along the Galactic Plane, and we will show how these parameters, and those describing the rest of components, correlate between each other. Some of the recovered correlations are the ones between the thermal dust and AME amplitudes (which is currently well-known), the AME peak emission frequency and the dust temperature, or the AME emissivity and the interstellar radiation field (ISRF) strength. Finally, we will show how lacking the 10-20\,GHz data from QUIJOTE-MFI can result in an underestimation (as large of 50\%) of the AME recovered signal. These results will be included in Fernández-Torreiro, M. et al. (2022, in prep).