Dark Matter Effects on Compact Binary Stars
  As compact binary star systems move inside the halo of our Galaxies, they
interact with dark matter particles. The interaction between dark matter
particles and baryonic matter causes dark matter particles to lose some part of
their kinetic energy. After dark matter particles have lost part of their
kinetic energy, they gravitationally bound to stars and stars start to accrete
dark matter particles from the halo. The accretion of dark matter particles
inside compact binary systems increases the mass of the binary components and
then, the total mass of the binary systems increases too. According to Kepler's
third law, increased mass by this way can affect other physical parameters
(e.g. semi-major axes and orbital periods) of these systems too. In this work,
we estimated the period change of some known compact binary systems due to the
accretion of dark matter particles into them. We investigated the effects of
different dark matter particle candidates with masses in the range $\simeq
10^{-15} - 10^{5} GeV.c^{-2}$ and dark matter density as high as the dark
matter density near the Galactic central regions. Our overall result is that
the estimated period change due to the accretion of dark matter particles into
compact binary systems can be as high as the measured values for these systems.
