Discrepancy between synchrotron models s4, s5 and s7 and Planck LFI 30 GHz data

[1cosmologist]

This is an effort to validate the PySM3 synchrotron models by comparing with Planck LFI 30 GHz (NPIPE Full, A and B splits) and WMAP 23 GHz (9year) maps. For this I generate synchrotron maps for models s4, s5, and s7 at 30 GHz at NSIDE=512. A color correction factor of 0.969 is multiplied to the LFI 30GHz, and a factor of 0.427 is multiplied to the WMAP K band. I also use an inverse noise variance weighted computation of the synchrotron map at 30 GHz by Jacques Delabrouille. All maps are reconvolved with a 2 degree beam. The power spectrum is computed for three cases: A. 70% galactic synchrotron mask, B. 33% mask of the northern part of the galactic mask and C. 37% mask of the southern part of galactic mask.

All The EE and BB power spectra computed from models and maps for 70% mask:

For north sky:

For south sky:

Clearly, the models show discrepancies when compared with the data. This discrepency is very much present in the multipole range important for primordial B-mode science.