Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Identifying a first-order phase transition in neutron star mergers
  through gravitational waves   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.

7
The categories of this paper are: hep-th
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int