Signatures Of Scalar Photon Interaction In Astrophysical Situations
  Dimension-5 photon ($\gamma$) scalar ($\phi$) interaction terms usually
appear in the Lagrangian of bosonic sector of unified theories of
electromagnetism and gravity. This interaction makes the medium dichoric and
induces optical activity. We have modelled the propagation of photons with this
interaction in the environment of cold a magnetized compact star (White Dwarf
(WD) or Neutron Star (NS)), assuming synchro-curvature process as the dominant
mechanism of emission. We have tried to outline the polarimetric implications
of photon-scalar coupling on the produced spectrum of these emissions in the
stellar atmosphere. Further more assuming the 'emission-energy vs
emission-altitude' relation, that is believed to hold in such (i.e. cold
magnetized WD or NS) environments, we have tried to point out the possible
modifications to the radiation spectrum when the same is incorporated along
with dim-5 photon scalar mixing operator.
