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Article Dans Une Revue Physical Review Letters Année : 2019

Identifying a first-order phase transition in neutron star mergers through gravitational waves

Andreas Bauswein
  • Fonction : Auteur
Niels-Uwe F. Bastian
  • Fonction : Auteur
David B. Blaschke
  • Fonction : Auteur
Katerina Chatziioannou
  • Fonction : Auteur
James A. Clark
  • Fonction : Auteur
Tobias Fischer
  • Fonction : Auteur
Micaela Oertel

Résumé

We identify an observable imprint of a first-order hadron-quark phase transition at supranuclear densities on the gravitational-wave (GW) emission of neutron-star mergers. Specifically, we show that the dominant postmerger GW frequency fpeak may exhibit a significant deviation from an empirical relation between fpeak and the tidal deformability if a strong first-order phase transition leads to the formation of a gravitationally stable extended quark matter core in the postmerger remnant. A comparison of the GW signatures from a large, representative sample of microphysical, purely hadronic equations of state indicates that this imprint is only observed in those systems which undergo a strong first-order phase transition. Such a shift of the dominant postmerger GW frequency can be revealed by future GW observations, which would provide evidence for the existence of a strong first-order phase transition in the interior of neutron-stars.
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Dates et versions

hal-01880709 , version 1 (30-08-2022)

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Andreas Bauswein, Niels-Uwe F. Bastian, David B. Blaschke, Katerina Chatziioannou, James A. Clark, et al.. Identifying a first-order phase transition in neutron star mergers through gravitational waves. Physical Review Letters, 2019, 122 (6), pp.061102. ⟨10.1103/PhysRevLett.122.061102⟩. ⟨hal-01880709⟩
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