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We propose three scenarios for compact hybrid stars composed of nuclear anddark matter. These hybrid stars could provide alternative interpretations tothe LIGO/Virgo events GW170817 and GW190425. To demonstrate our proposal, wesolve the Tolman-Oppenheimer-Volkoff configurations of hybrid stars by usingthe SLy4, APR4, and SKb equations of state (EoS) for nuclear matter, and an EoSfor a bosonic self interacting dark matter (SIDM) proposed by Colpi et al\cite{Colpi:1986ye}. We then obtain their mass-radius and tidal Love number(TLN)-mass relations, and further examine the possible saddle instability ofthese compact objects by the generalized Bardeen-Thorne-Meltzer (BTM) criteria.Our results show that the hybrid star scenarios are able to explain GW170817and GW190425. Some hybrid stars can have compact neutron or mixed cores around10 km while possessing thick dark matter shells, thus they can be more massivethan the maximum mass of the typical neutron stars but are electromagneticallydetected with about the same size of neutron stars. Reversely, we also inferthe dark matter model from the parameter estimation of GW190425. Our proposedhybrid stars can be further tested by the coming LIGO/Virgo O3 events.

GW170817 and GW190425 as Hybrid Stars of Dark and Nuclear Matters