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Particles with strangeness content are predicted to populate dense matter,modifying the equation of state of matter inside neutron stars as well as theirstructure and evolution. In this work, we show how the modeling of strangenesscontent in dense matter affects the properties of isolated neutrons stars andthe tidal deformation in binary systems. For describing nucleonic and hyperonicstars we use the many-body forces model (MBF) at zero temperature, includingthe $\phi$ mesons for the description of repulsive hyperon-hyperoninteractions. Hybrid stars are modeled using the MIT Bag Model with vectorinteraction (vMIT) in both Gibbs and Maxwell constructions, for differentvalues of bag constant and vector interaction couplings. A parametrization witha Maxwell construction, which gives rise to third family of compact stars (twinstars), is also investigated. We calculate the tidal contribution that adds tothe post-Newtonian point-particle corrections, the associated love number forsequences of stars of different composition (nucleonic, hyperonic, hybrid andtwin stars), and determine signatures of the phase transition on thegravitational waves in the accumulated phase correction during the inspiralsamong different scenarios for binary systems. On the light of the recentresults from GW170817 and the implications for the radius of$\sim1.4\,\mathrm{M_{\odot}}$ stars, our results show that hybrid stars canonly exist if a phase transition takes place at low densities close tosaturation.

Constraining strangeness in dense matter with GW170817