Cosmic Birefringence (CB) is the in-vacuo rotation of the linear
polarization direction of photons during propagation, caused by
parity-violating extensions of Maxwell electromagnetism. Axions are
candidates for dark matter or dark energy components and are expected to
produce CB. Therefore, a CB signal could be a probe of a dark component of
the Universe.
We build low resolution CB angle maps using the Planck satellite legacy and
NPIPE products and provide for the first time estimates of the
cross-correlation spectra αE and αB between the CB and the CMB polarization
fields. We also provide updated CB αα auto-correlation spectra as well as
the αT cross-correlation with the CMB temperature field.