Abstract
We compute the tidal deformabilities for neutron star merger for equations of state with a strong first order phase transition producing a new separate branch in the mass-radius diagram. A case is found where all three possible pairs of combinations between these two neutron star branches are present for the total mass of of the observed merger event GW170817. It is demonstrated that the plot of the two tidal deformabilities and of the binary neutron star can show up to three separate branches. We propose that the future detections of neutron star merger events with the same value for but different values of serve as a signal for the existence of a strong first order phase transition in neutron star matter.
- Received 17 September 2018
- Revised 27 November 2018
DOI:https://doi.org/10.1103/PhysRevD.99.023009
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