Probing dark gauge boson with observations from neutron stars

Understand

We present an investigation on the production of light dark gauge bosons by the nucleon bremsstrahlung processes in the core of neutron stars.

• The dark vector is assumed to be a $U(1)_{B-L}$ gauge boson with a mass much below keV.
• We calculate the emission rate of the dark vector produced by the nucleon bremsstrahlung in the degenerate nuclear matter.
• In addition, we take into account the photon-dark vector conversion for the photon luminosity observed at infinity.