Journal
PHYSICAL REVIEW LETTERS
Volume 122, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.061102
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Funding
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [759253]
- Klaus-Tschira Foundation
- Polish National Science Center (NCN) [UMO-2016/23/B/ST2/00720]
- Russian Science Foundation [17-12-01427]
- MEPhI Academic Excellence Project [02.a03.21.0005]
- COST Actions [CA15213, CA16117, CA16214]
- Russian Science Foundation [17-12-01427] Funding Source: Russian Science Foundation
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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 f(peak) may exhibit a significant deviation from an empirical relation between f(peak) 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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