  Neutron star tidal deformability extracted from gravitational wave data
provides a novel probe to the interior neutron star structures and the
associated nuclear equation of state (EOS). Instead of the popular composition
of nucleons and leptons in neutron stars, we include hyperons and examine the
role of hyperons in the tidal deformability and its impact on the symmetry
energy in a relativistic mean-field approach with the density-dependent
parametrizations. The hyperons are found to have significant impact on the
deformability, correlated sensitively with the onset density and fraction of
hyperons in neutron star matter. Moderately lower onset density of hyperons can
yield considerable modification to the tidal deformability and shift its
inference on the nuclear EOS. The future measurements of the tidal
deformability at multi-fiducial star masses are anticipated to lift the
degeneracy between the contributions from the hyperon component and symmetry
energy.
