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arXiv · 2208.04294

Degeneracy in the inference of phase transitions in the neutron star equation of state from gravitational wave data

Carolyn A. Raithel·Elias R. Most
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Abstract

Gravitational wave (GW) detections of binary neutron star inspirals will be crucial for constraining the dense matter equation of state (EoS). We demonstrate a new degeneracy in the mapping from tidal deformability data to the EoS, which occurs for models with strong phase transitions. We find that there exists a new family of EoS with phase transitions that set in at different densities and that predict neutron star radii that differ by up to ~500m, but that produce nearly identical tidal deformabilities for all neutron star masses. Next generation GW detectors and advances in nuclear theory may be needed to resolve this degeneracy.

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Carolyn A. Raithel, Elias R. Most. 2022-08-08. Degeneracy in the inference of phase transitions in the neutron star equation of state from gravitational wave data. https://doi.org/10.1103/physrevlett.130.201403

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