Gravitational waves (GWs) emitted during the coalescence of binary neutron star (BNS) systems carry information about the equation of state (EoS) describing the extremely dense matter inside neutron stars (NSs). In particular, the EoS determines the fate of the binary after the merger: a prompt collapse to black hole (BH), or the formation of a NS remnant that is either stable or survives up to a few seconds before collapsing to a BH. Determining the evolution of a BNS system will therefore place strong constraints on the EoS. We present a morphology-independent method, developed in the framework of the coherentWaveBurst analysis of signals from ground-based interferometric detectors of GWs. The method characterizes the time-frequency postmerger GW emission from a BNS system, and determines whether, after the merger, it formed a remnant NS or promptly collapsed to a BH. We measure the following quantities to characterize the postmerger emission: ratio of signal energies and match of luminosity profile in different frequency bands, weighted central frequency and bandwidth. From these quantities, based on the study of signals simulated through injections of numerical relativity waveforms, we build a statistics to discriminate between the different scenarios after the merger. Finally, we test our method on a set of signals simulated with new models, to estimate its efficiency as a function of the source distance.

Tringali, M., Puecher, A., Lazzaro, C., Ciolfi, R., Drago, M., Giacomazzo, B., et al. (2023). Morphology-independent characterization method of postmerger gravitational wave emission from binary neutron star coalescences. CLASSICAL AND QUANTUM GRAVITY, 40(22) [10.1088/1361-6382/acfc0d].

Morphology-independent characterization method of postmerger gravitational wave emission from binary neutron star coalescences

Giacomazzo B.;
2023

Abstract

Gravitational waves (GWs) emitted during the coalescence of binary neutron star (BNS) systems carry information about the equation of state (EoS) describing the extremely dense matter inside neutron stars (NSs). In particular, the EoS determines the fate of the binary after the merger: a prompt collapse to black hole (BH), or the formation of a NS remnant that is either stable or survives up to a few seconds before collapsing to a BH. Determining the evolution of a BNS system will therefore place strong constraints on the EoS. We present a morphology-independent method, developed in the framework of the coherentWaveBurst analysis of signals from ground-based interferometric detectors of GWs. The method characterizes the time-frequency postmerger GW emission from a BNS system, and determines whether, after the merger, it formed a remnant NS or promptly collapsed to a BH. We measure the following quantities to characterize the postmerger emission: ratio of signal energies and match of luminosity profile in different frequency bands, weighted central frequency and bandwidth. From these quantities, based on the study of signals simulated through injections of numerical relativity waveforms, we build a statistics to discriminate between the different scenarios after the merger. Finally, we test our method on a set of signals simulated with new models, to estimate its efficiency as a function of the source distance.
Articolo in rivista - Articolo scientifico
binary neutron stars; gravitational waves; morphology-independent; postmerger;
English
2023
40
22
225008
none
Tringali, M., Puecher, A., Lazzaro, C., Ciolfi, R., Drago, M., Giacomazzo, B., et al. (2023). Morphology-independent characterization method of postmerger gravitational wave emission from binary neutron star coalescences. CLASSICAL AND QUANTUM GRAVITY, 40(22) [10.1088/1361-6382/acfc0d].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/451118
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
Social impact