2017/12/31 by Vasileios Paschalidis, Kent Yagi, David Alvarez-Castillo +3 · 260 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astronomy #Astrophysics #Equation of state #Exotic star #Gamma-ray bursts and supernovae #General relativity #Gravitation #Gravitational wave #High-pressure geophysics and materials #Neutron star #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Quark star #Stars #Strange matter #Theoretical physics #astro-ph.HE #gr-qc #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.97.084038
published in Physical review. D/Physical review. D. 97(8) (American Physical Society) · 8 pages, 4 figures, 2 tables; matches published version, updated fig. 2
openalex publication_date 2018/04/23 · arxiv created 2018/05/04 · arxiv updated 2018/05/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Gravitational wave observations of GW170817 placed bounds on the tidal deformabilities of compact stars, allowing one to probe equations of state for matter at supranuclear densities. Here we design new parametrizations for hybrid hadron-quark equations of state, which give rise to low-mass twin stars, and test them against GW170817. We find that GW170817 is consistent with the coalescence of a binary hybrid star-neutron star. We also test and find that the I-Love-Q relations for hybrid stars in the third family agree with those for purely hadronic and quark stars within \ensuremath∼3% for both slowly and rapidly rotating configurations, implying that these relations can be used to perform equation-of-state independent tests of general relativity and to break degeneracies in gravitational waveforms for hybrid stars in the third family as well.