TY - JOUR
T1 - Implications from GW170817 and I-Love-Q relations for relativistic hybrid stars
AU - Paschalidis, Vasileios
AU - Yagi, Kent
AU - Alvarez-Castillo, David
AU - Blaschke, David B.
AU - Sedrakian, Armen
N1 - Funding Information:
D. E. A-C. is grateful for support by the ExtreMe Matter Institute EMMI at the GSI Helmholtzzentrum für Schwerionenphysik Darmstadt, Germany, as well as to the Heisenberg-Landau and Bogoliubov-Infeld programs for collaboration between JINR Dubna and Institutions in Germany and Poland, respectively. D. B. is supported by the Russian Science Foundation under Contract No. 7-12-01427. D. E. A-C., D. B., and A. S. acknowledge partial support by the COST Action MP1304 (NewCompStar) for networking activities. A. S. is supported by the Deutsche Forschungsgemeinschaft (Grant No. SE 1836/3-2). K. Y. would like to acknowledge networking support by the COST Action GWverse CA16104.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/4/23
Y1 - 2018/4/23
N2 - 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 ∼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.
AB - 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 ∼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.
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U2 - 10.1103/PhysRevD.97.084038
DO - 10.1103/PhysRevD.97.084038
M3 - Article
AN - SCOPUS:85047126292
SN - 2470-0010
VL - 97
JO - Physical Review D
JF - Physical Review D
IS - 8
M1 - 084038
ER -