Double dark-matter admixed neutron star
  The dark matter in neutron stars can exist from the lifetime of the
progenitor or captured by this compact object. The properties of dark matter
entered the neutron stars through each step could be different from each other.
Here, we investigate the structure of neutron stars which are influenced by the
dark matter in two processes. Applying a generalization of two-fluid formalism
to three-fluid one and the equation of state from the rotational curves of
galaxies, we explore the structure of double dark-matter admixed neutron stars.
The behavior of the neutron and dark matter portions for these stars is
considered. In addition, the influence of the dark matter equations of state on
the stars with different contributions of visible and dark matter is studied.
The gravitational redshift of these stars in different cases of dark matter
equations of state is investigated.
