A relativistic jet has been produced in the single well-localised binary neutron star (BNS) merger detected to date in gravitational waves (GWs), and the local rates of BNS mergers and short gamma-ray bursts are of the same order of magnitude. This suggests that jet formation is not a rare outcome for BNS mergers, and we show that this intuition can be turned into a quantitative constraint: At least about one-Third of GW-detected BNS mergers and at least about one-fifth of all BNS mergers should produce a successful jet (90% credible level). Whether a jet is launched depends on the properties of the merger remnant and of the surrounding accretion disc, which in turn are a function of the progenitor binary masses and equation of state (EoS). The incidence of jets in the population therefore carries information about the binary component mass distribution and EoS. Under the assumption that a jet can only be produced by a black hole remnant surrounded by a non-negligible accretion disc, we show how the jet incidence can be used to place a joint constraint on the space of BNS component mass distributions and EoS. The result points to a broad mass distribution, with particularly strong support for masses in the 1.3â âà  à  â 1.6â Mâà Šà  range. The constraints on the EoS are shallow, but we show how they will tighten as the knowledge on the jet incidence improves. We also discuss how to extend the method to include future BNS mergers, with possibly uncertain jet associations.

Salafia, O., Colombo, A., Gabrielli, F., Mandel, I. (2022). Constraints on the merging binary neutron star mass distribution and equation of state based on the incidence of jets in the population. ASTRONOMY & ASTROPHYSICS, 666(October 2022), 1-16 [10.1051/0004-6361/202243260].

Constraints on the merging binary neutron star mass distribution and equation of state based on the incidence of jets in the population

Salafia O. S.
Primo
;
Colombo A.
Secondo
;
2022

Abstract

A relativistic jet has been produced in the single well-localised binary neutron star (BNS) merger detected to date in gravitational waves (GWs), and the local rates of BNS mergers and short gamma-ray bursts are of the same order of magnitude. This suggests that jet formation is not a rare outcome for BNS mergers, and we show that this intuition can be turned into a quantitative constraint: At least about one-Third of GW-detected BNS mergers and at least about one-fifth of all BNS mergers should produce a successful jet (90% credible level). Whether a jet is launched depends on the properties of the merger remnant and of the surrounding accretion disc, which in turn are a function of the progenitor binary masses and equation of state (EoS). The incidence of jets in the population therefore carries information about the binary component mass distribution and EoS. Under the assumption that a jet can only be produced by a black hole remnant surrounded by a non-negligible accretion disc, we show how the jet incidence can be used to place a joint constraint on the space of BNS component mass distributions and EoS. The result points to a broad mass distribution, with particularly strong support for masses in the 1.3â âà  à  â 1.6â Mâà Šà  range. The constraints on the EoS are shallow, but we show how they will tighten as the knowledge on the jet incidence improves. We also discuss how to extend the method to include future BNS mergers, with possibly uncertain jet associations.
Articolo in rivista - Articolo scientifico
Gamma-ray burst: general; Gravitational waves; Pulsars: general; Relativistic processes; Stars: luminosity function, mass function; Stars: neutron;
English
24-ott-2022
2022
666
October 2022
1
16
A174
open
Salafia, O., Colombo, A., Gabrielli, F., Mandel, I. (2022). Constraints on the merging binary neutron star mass distribution and equation of state based on the incidence of jets in the population. ASTRONOMY & ASTROPHYSICS, 666(October 2022), 1-16 [10.1051/0004-6361/202243260].
File in questo prodotto:
File Dimensione Formato  
Salafia-2022-Astron Astrophys-VoR.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Creative Commons
Dimensione 1.03 MB
Formato Adobe PDF
1.03 MB Adobe PDF Visualizza/Apri

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/10281/458059
Citazioni
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 6
Social impact