Circular polarization of cosmic photons due to their interactions with sterile neutrino dark matter

• somayye mahmoudi (Shiraz University)

Astrophysical searches of Warm Dark Matter (WDM) candidate in new physics are essential part of the experimental efforts to explore the nature of WDM. In this talk, I will propose an indirect method to search for WDM particles via studying their effects on the polarization of cosmic photons through cosmic photon-sterile neutrino scattering. I will consider GRB photons, galactic and extra galactic radio photons and the CMB photons as sources of cosmic rays and I will report the amount of possible circular polarization for each case via their scattering from the Sterile neutrino. This method might open a new observational window to explore the nature of DM